JBL Musical Instrument Prx525 User Manual

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U s e r ’ s G u i d e  
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CONTENTS  
Important Safety Instructions  
4
Precautions  
5
The PRX500 Series Power Amplifier  
Introduction To The PRX500 Series  
System Specifications  
System Setup  
8 - 9  
10  
11 - 15  
16 - 19  
20  
Setting Input Sensitivity  
Setting The Gain  
21  
Application Examples  
Reference  
22 - 25  
26  
Cables and Connectors  
Troubleshooting  
27  
28 - 29  
30  
Contact Information  
Warranty Information  
31  
3
 
IMPORTANT SAFETY INSTRUCTIONS  
1. Read these instructions.  
2. Keep these instructions.  
3. Heed all warnings.  
4. Follow all instructions.  
5. Do not use this apparatus near water.  
6. Clean only with dry cloth.  
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.  
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including  
amplifiers) that produce heat.  
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades  
with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide  
blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult  
an electrician for replacement of the obsolete outlet.  
10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and  
the point where they exit from the apparatus.  
11. Only use attachments/accessories specified by the manufacturer.  
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold  
with the apparatus. When a cart is used, use caution when moving the cart/apparatus  
combination to avoid injury from tip-over.  
13. Unplug this apparatus during lightning storms or when unused for long periods of time.  
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been  
damaged in any way, such as power supply cord or plug is damaged, liquid has been spilled or objects have  
fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or  
has been dropped.  
15. If Service Instruction in Owner's Manual: "CAUTION - THESE SERVICING INSTRUCTIONS ARE FOR  
USE BY QUALIFIED SERVICE PERSONNEL ONLY. TO REDUCE THE RISK OF ELECTRIC SHOCK DO  
NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING  
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO."  
16. To completely disconnect this apparatus from the ac mains, disconnect the power supply cord plug  
from the ac receptacle.  
17. “WARNING – TO REDUCE THE RISK OF FIRE OR ELECTRIC – SHOCK, DO NOT EXPOSE THIS  
APPARATUS TO RAIN OR MOISTURE.”  
18. Do not expose this equipment to dripping or dripping or splashing and ensure that no objects filled with  
liquids, such as vases, are placed on the equipment.  
19. The mains plug of the power supply cord shall remain readily operable.  
Care And Cleaning  
PRX500 series systems may be cleaned with a dry cloth. Do not get moisture into any of the openings in the  
system. Ensure that the system is unplugged from the AC outlet before cleaning. In the event the DuraFlex finish  
is damaged a touch up kit can be obtained from JBL Professional (part number 363972-001).  
THIS APPARATUS CONTAINS POTENTIALLY LETHAL VOLTAGES. TO PREVENT ELECTRIC SHOCK OR  
HAZARD, DO NOT REMOVE CHASSIS, INPUT MODULE OR AC INPUT COVERS. NO USER SERVICEABLE  
PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.  
4
 
PRECAUTIONS  
The PRX500 series speakers covered by this manual are not intended for fixed installation and  
high moisture environments. Moisture can damage the speaker cone and surround and cause  
corrosion of electrical contacts and metal parts. Avoid exposing the speakers to direct moisture.  
Keep speakers out of extended or intense direct sunlight. The driver suspension will  
prematurely dry out and finished surfaces may be degraded by long-term exposure to intense  
ultra-violet (UV) light. PRX500 series speakers can generate considerable energy. When placed  
on a slippery surface such as polished wood or linoleum, the speaker may move due to its acoustical energy  
output. Precautions should be taken to assure that the speaker does not fall off a stage or table on  
which it is placed.  
Stand Mounting Safety Precautions  
Some PRX500 series models include a 36 mm receptacle cup to allow mounting on tripod stands or on a pole  
over subwoofers. When using stands or poles, be sure to observe the following precautions:  
• Check the stand or pole specification to be certain the device is designed to support the weight of the  
speaker. Observe all safety precautions specified by the manufacturer.  
• Always verify that the stand (or subwoofer/pole) is placed on a flat, level and stable surface and be  
sure to fully extend the legs of tripod type stands. Position the stand so that the legs do not present a  
trip hazard.  
• Route cables so that performers, production crew, and audience will not trip and topple the speakers over.  
• Inspect the stand (or pole and associated hardware)before each use and do not use equipment with  
worn, damaged or missing parts.  
• Do not attempt to place more than one PRX500 series speaker on a stand or pole.  
• Always be cautious in windy, outdoor conditions. It may be necessary to place additional weight (i.e.  
sandbags) on the base of the stand to improve stability. Avoid attaching banners or similar items to any  
part of a speaker system. Such attachments could act as a sail and topple the system.  
• Unless you are confident that you can handle the weight of the speaker, ask another person to help  
you get it onto the tripod stand or pole.  
Hearing Damage, Prolonged Exposure To Excessive SPL  
PRX500 series loudspeakers are easily capable of generating sound pressure levels (SPL) sufficient to cause  
permanent hearing damage to performers, production crew and audience members. Caution should be taken to  
avoid prolonged exposure to SPL in excess of 90 dB.  
5
 
WATCH FOR THESE SYMBOLS!  
C A U T I O N  
-
TO REDUCE THE  
WARNING  
RISK OF ELECTRIC SHOCK  
RISK OF FIRE OR ELECTRIC SHOCK,  
DO NOT EXPOSE THIS EQUIPMENT  
TO RAIN OR MOISTURE.  
DO NOT OPEN  
!
RISQUE DE CHOC ELECTRIQUE  
NE PAS OUVRIR  
The lightning flash with arrowhead symbol within  
an equilateral triangle, is intended to alert the  
user to the presence of uninsulated." "Dangerous  
Voltage" within the products enclosure that may be  
of sufficient magnitude to consitute a risk of  
electric shock to persons.  
The exclamation point within an equi-lateral triangle is  
intended to alert the user to the presence of important  
operating and maintenance (Servicing) instructions in  
the literature accompanying the product.  
6
 
PRX500 Series speakers Declaration of Conformity  
Safety And EMC Compliance Specifications  
EN 55103-1:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual  
and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions  
EN 55103-1:1997 Magnetic Field Emissions-Annex A @ 10 cm and 20 cm  
EN 55022:2003 Limits and Methods of Measurement of Radio Disturbance Characteristics  
of ITE: Radiated, Class B Limits; Conducted, Class A  
EN 55103-2:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual  
and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity  
EN 61000-4-2: A2:2001 Electrostatic Discharge Immunity (Environment  
E2-criteria B, 4 kV Contact, 8 kV Air discharge)  
EN 61000-4-3:2003 Radiated, Radio-frequency, Electromagnetic Immunity (Environment E2, criteria A)  
EN61000-4-4:2005 Electrical Fast Transient/Burst Immunity (criteria B)  
EN 61000-4-5:2001 Surge Immunity (criteria B)  
EN 61000-4-6:1996 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (criteria A)  
EN 61000-4-11:2004 Voltage Dips, Short Interruptions and Voltage Variation  
UL 6500 2nd Edition 1999 Audio/Video and Musical Instruments Apparatus for Household, Commercial, and  
Similar General Use  
CAN/CSA-E60065-00 Audio, video and similar apparatus - Safety requirements  
CSA Compliance Notice  
CSA Certification Applies to Amplifier Module Only  
CSA Certified to operate only at 120V~ in Canada  
FCC Compliance Notice  
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This  
device may not cause harmful interference, and (2) this device must accept any interference received, including  
interference that may cause undesired operation.  
CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void  
the user’s authority to operate the equipment.  
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant  
to part of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference  
in a residential in a residential installation. This equipment generates, uses, and can radiate radio frequency  
energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference  
to radio communications. However there is no guarantee that the interference will not occur in a particular  
installation. If this equipment does cause harmful interference to radio and television reception, which can be  
determined by turning the equipment off and on, the user is encouraged to try to collect the interference by one  
or more of the following measures.  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and reliever.  
• Connect the equipment into an outlet on a circuit different from that to which the reliever is connected.  
• Consult the dealer or an experienced radio / TV technician for help.  
7
 
The PRX500 Series power amplifier  
AC Power Requirements  
Standard PRX500 series speaker systems are equipped with a multi-channe Crown Class-D power amplifier  
and loudspeaker specific DSP electronics and require appropriate AC power. Before plugging a PRX500  
speaker into an outlet ensure that it is able to provide the appropriate AC power as set on the speaker.  
A robust AC supply is necessary for maximum performance. If the supply is too weak the bass performance may  
be affected and if it sags (drops) too much the system may self-mute to protect itself. As soon as the appropriate  
AC supply is restored it will continue to operate. Plugging multiple systems into the same outlet and long  
extension cord runs may affect the AC supply to the systems.  
CAUTION  
In compliance with safety agency criteria and proper system operation, it is critical that the system installer  
observe all electrical safety practices at all times and provide proper earth grounding for all AC Power  
connections.  
Powering Up  
The main power switch is located on the input panel on the back of the enclosure. Always ensure that the  
speaker system is the last thing you power up, and the first thing to turn off when operating your complete PA  
system. If speaker systems are daisy chained together always turn off the last system in the chain first. Power  
“on” is indicated by the illumination of the logo on the front of the enclosure.  
Changing Voltage  
Your PRX500 series speaker will typically be set at the factory to accommodate the power mains voltage in your  
area. Before you set up your PRX500 series speaker for the first time it is a good idea to verify that the setting  
of the selector is appropriate for the power in your area. In the event that you do need to change the voltage:  
• Make sure that the speaker is powered off and the AC is disconnected from the speaker.  
• Directly above the male IEC connector on the speaker is a voltage selector. Just slide the  
switch to the appropriate setting.  
• Set the voltage selector switch to the 115V for (100-120V~) or 230V for (220-240V~) range setting  
as required for your area.  
• After having reconfirmed that the correct voltage is selected, reconnect the AC (IEC connector)  
and power the unit up.  
DO NOT UNDER ANY CIRCUMSTANCES OPERATE THE UNIT WITH THE WRONG VOLTAGE SELECTED.  
DOING SO MAY RESULT IN SERIOUS DAMAGE TO YOUR SPEAKER SYSTEM WHICH WILL NOT BE  
COVERED BY WARRANTY.  
CLASS 2 WIRING  
Class 2 output wiring.  
8
 
Operating Temperature  
The design of the Crown amplifier is such that it is very energy efficient and as a result does not get really hot.  
In the rare event that it does get too hot it will automatically shut down to protect itself. When its temperature  
has returned to within its operating range it will turn back on. A Condition under which this may occur is when  
the system is operated in very high ambient temperatures and the heat sink on the rear of the enclosure is in  
direct sunlight. Always ensure adequate cooling and appropriate shade.  
9
 
Introduction to the PRX500 series  
PRX512M  
PRX518S  
PRX515  
PRX525  
PRX535  
Thank you for choosing the JBL PRX500 series self-powered PA loudspeakers. There are five models in the  
series, four full-range systems and one subwoofer. All are powered by integrated digital power amplifiers  
developed by Crown, the most trusted name in professional sound reinforcement power amplification. In addition  
to Crown power amplifiers, the systems are equipped with sophisticated DSP for EQ, crossover, system control  
and protection. Engineered and manufactured by JBL Professional with precision and care, your PRX500 series  
speaker will provide you with many years of flawless performance. To ensure you are always receiving optimum  
performance we encourage you to review this user’s guide completely before hooking up your new system.  
In addition to the high performance light weight Crown amplifier, PRX500 series utilizes the latest in JBL  
transducer technology. New 400 watt neodymium Differential Drive® transducers not only provide high sound  
pressure levels with minimum distortion and power compression, but they are also incredibly light. Combined  
together in highly engineered enclosures, PRX500 series speaker systems deliver the highest performance to  
weight ratio in the class – portable PA that’s actually portable.  
All PRX500 systems are built road tough; covered with JBL’s DuraFlex™, one of the most durable finishes ever  
created for a speaker and protected by heavy-duty foam backed steel grilles. The foam backing not only looks  
excellent but it stops direct liquid intrusion and it does not affect the acoustics. The larger systems have an extra  
layer of protection from the road in the form of tough polypropylene end-caps. These are independent of the  
acoustic enclosure so in the event of really tough knocks the speaker’s performance will not suffer.  
Single Box On A Pole Coverage  
The PRX512M features a dual angle pole socket this provides flexibility in aiming the speaker. As a guide line,  
the speaker should be positioned so that the audience cannot see the top or bottom panels of the speaker. The  
PRX515 and PRX535 also feature a pole mount of the ‘single’ socket variety. When using stands or poles, be  
sure to observe the precautions as stated in the “Precautions” section of the manual.  
10  
 
SYSTEM SPECIFICATIONS  
PRX512M  
System Type:  
Self powered 12", two-way, bass-reflex  
Frequency Range (-10 dB):  
46Hz - 20kHz (EQ in main position)  
60Hz - 20kHz (EQ in monitor position)  
Frequency Response (±3 dB):  
76Hz - 20kHz (EQ in main position)  
90Hz - 20kHz (EQ in monitor position)  
Coverage Pattern:  
70º x 70º nominal  
10.2 dB  
Directivity Index (DI):  
Directivity Factor (Q):  
Crossover Modes:  
10.8  
DSP controlled 48dB filter slope  
1.6kHz  
Crossover Frequency:  
System Power Rating:  
LF Power amp:  
500 W continuous, 1000W peak  
Class-D, 400 Watt (continuous) at driver impedance  
HF Power amp:  
Distortion:  
Class-D, 100 Watt (continuous) at driver impedance  
Less than 0.1% at rated power  
1
Maximum Peak Output:  
Signal indicators:  
133dB SPL  
Overload: Red LED indicates input overload condition  
Signal: Green LED indicates signal present  
Input sensitivity:  
Mic position: -25 dBu to 0 dBu  
Line position: +28 dBu to +10 dBu  
Input Impedance:  
EQ:  
64 K Ohms (balanced), 32 K Ohms (unbalanced)  
Presets for use in Main and Monitor position  
LF Driver:  
1 x JBL 262F 380 mm (12 in) Differential Drive® woofer  
HF Driver:  
1 x JBL 2408H 37.5 mm (1.5 in) annular polymer diaphragm,  
neodymium compression driver  
Enclosure:  
Trapezoidal, 18 mm, plywood  
Dual 36mm pole socket  
Suspension / Mounting:  
Transport:  
Finish:  
Integrated handle with backing cup  
Anthracite DuraFlex™ finish  
Grille:  
Powder coated, Anthracite, 18 gauge perforated steel  
with acoustical transparent black foam backing.  
Input Connectors:  
Balanced XLR / 1/4 inch combo jack with XLR loop through,  
Dimensions (H x W x D):  
650 mm x 380 mm x 350 mm  
(25.5 in x 15 in x 14 in)  
Net Weight:  
18 kg (40 lb.)  
1
Maximum Peak output measured with IEC pink noise at 1 meter in front of speaker baffle under free space conditions. Measurement instrument  
set to peak hold. Speaker muted and released at full power, recording maximum peak level.  
11  
 
PRX515  
System Type:  
Self powered 15", two-way, bass-reflex  
45Hz - 20kHz (EQ in flat position)  
Frequency Range (-10 dB):  
Frequency Response (±3 dB):  
52Hz - 20kHz (EQ in flat position)  
Coverage Pattern:  
70º x 70º nominal  
10.3 dB  
Directivity Index (DI):  
Directivity Factor (Q):  
Crossover Modes:  
10.8  
DSP controlled 48dB filter slope  
Crossover Frequency:  
System Power Rating:  
1.6kHz  
500 W continuous, 1000W peak  
LF Power amp:  
HF Power amp:  
Distortion:  
Class-D, 400 Watt (continuous) at driver impedance  
Class-D, 100 Watt (continuous) at driver impedance  
Less than 0.1% at rated power  
1
Maximum Peak Output:  
Signal indicators:  
133dB SPL  
Overload: Red LED indicates input overload condition  
Signal: Green LED indicates signal presents  
Input sensitivity:  
Mic position: -25 dBu to 0 dBu  
Line position: +28 dBu to +10 dBu  
Input Impedance:  
EQ:  
64 K Ohms (balanced), 32 K Ohms (unbalanced)  
Presets for Main and Monitor position  
LF Driver:  
HF Driver:  
1 x JBL 265F 380 mm (15 in) Differential Drive® woofer  
1 x JBL 2408H 37.5 mm (1.5 in) annular polymer diaphragm,  
neodymium compression driver  
Enclosure:  
Trapezoidal, 18 mm, plywood with polypropylene end caps  
Dual 36mm pole socket  
Suspension / Mounting:  
Transport:  
2 x die-cast handles with backing cup  
Anthracite DuraFlex™ finish  
Finish:  
Grille:  
Powder coated, Anthracite, 18 gauge perforated steel  
with acoustical transparent black foam backing.  
Input Connectors:  
Balanced XLR / 1/4 inch combo jack with XLR loop through,  
Dimensions (H x W x D):  
815 mm x 440 mm x 465 mm  
(32 in x 17.25 in x 18.25 in)  
Net Weight:  
26 kg (57 lb.)  
1
Maximum Peak output measured with IEC pink noise at 1 meter in front of speaker baffle under free space conditions. Measurement instrument  
set to peak hold. Speaker muted and released at full power, recording maximum peak level.  
12  
 
PRX525  
System Type:  
Self powered dual 15", two-way, bass-reflex  
40Hz - 20kHz (EQ in flat position)  
Frequency Range (-10 dB):  
Frequency Response (±3 dB):  
Coverage Pattern:  
52Hz - 20kHz (EQ in flat position)  
70º x 70º nominal  
Directivity Index (DI):  
10.3 dB  
Directivity Factor (Q):  
Crossover Modes:  
10.8  
DSP controlled 48dB filter slope  
1.6kHz  
Crossover Frequency:  
System Power Rating  
LF Power amp:  
650 W continuous, 1300W peak  
Class-D, 275 Watt (continuous) at driver impedance  
LF2 Power amp:  
HF Power amp:  
Distortion:  
Class-D, 275 Watt (continuous) at driver impedance  
Class-D, 100 Watt (continuous) at driver impedance  
Less than 0.1% at rated power  
Maximum Peak Output:  
Signal indicators:  
135dB SPL1  
Overload: Red LED indicates input overload condition  
Signal: Green LED indicates signal presents  
Input sensitivity:  
Mic position: -25 dBu to 0 dBu  
Line position: +28 dBu to +10 dBu  
Input Impedance:  
EQ:  
64 K Ohms (balanced), 32 K Ohms (unbalanced)  
Presets for Flat or Boost  
LF Driver:  
HF Driver:  
2 x JBL 265F 380 mm (15 in) Differential Drive® woofer  
1 x JBL 2408H 37.5 mm (1.5 in) annular polymer diaphragm,  
neodymium compression driver  
Enclosure:  
Transport:  
Finish:  
Trapezoidal, 18 mm, plywood with polypropylene end caps  
2 x die-cast handles with backing cup  
Anthracite DuraFlex™ finish  
Grille:  
Powder coated, Anthracite, 18 gauge perforated steel  
with acoustical transparent black foam backing  
Input Connectors:  
Balanced XLR / 1/4 inch combo jack with XLR loop through,  
Dimensions (H x W x D):  
1300 mm x 440 mm x 465mm  
(51 in x 17.25 in x 18.25 in)  
Net Weight:  
38 kg (84 lb.)  
1
Maximum Peak output measured with IEC pink noise at 1 meter in front of speaker baffle under free space conditions. Measurement instrument  
set to peak hold. Speaker muted and released at full power, recording maximum peak level.  
13  
 
PRX535  
System Type:  
Self powered 15", three-way, bass-reflex  
39Hz - 20kHz (EQ in flat position)  
46Hz - 20kHz (EQ in flat position)  
90º x 50º nominal  
Frequency Range (-10 dB):  
Frequency Response (±3 dB):  
Coverage Pattern:  
Directivity Index (DI):  
Directivity Factor (Q):  
Crossover Modes:  
10.6 dB  
11.4  
DSP controlled 24dB filter slope  
Crossover Frequency:  
System Power Rating:  
LF Power amp:  
430 Hz, 2.6kHz  
650 W continuous, 1300W peak  
Class-D, 400 Watt (continuous) at driver impedance  
Class-D, 150 Watt (continuous) at driver impedance  
Class-D, 100 Watt (continuous) at driver impedance  
Less than 0.1% at rated power  
MF Power amp:  
HF Power amp:  
Distortion:  
Maximum Peak Output:  
Signal indicators:  
134dB SPL peak1  
Overload: Red LED indicates input overload condition  
Signal: Green LED indicates signal presents  
Input sensitivity:  
Input Impedance:  
Mic position: -25 dBu to 0 dBu  
Line position: +28 dBu to +10 dBu  
64 K Ohms (balanced), 32 K Ohms (unbalanced)  
EQ:  
Presets for Flat or Boost  
LF Driver:  
1 x JBL 265F, 380 mm (15 in) Differential Drive® woofer  
MF Driver:  
HF Driver:  
1 x JBL 195H, 165 mm (6.5 in) woofer  
1 x JBL 2414H 25 mm (1.0 in) annular polymer diaphragm,  
neodymium HF compression driver  
Enclosure:  
Trapezoidal, 18 mm, plywood with polypropylene end caps  
Suspension / Mounting:  
Transport:  
36 mm pole socket  
2 x die-cast handles with backing cup  
Anthracite DuraFlex™ finish  
Finish:  
Grille:  
Powder coated, Anthracite, 18 gauge perforated steel  
with acoustical transparent black foam backing.  
Input Connectors:  
Balanced XLR / 1/4 inch combo jack with XLR loop through,  
Dimensions (H x W x D):  
1070 mm x 440 mm x 465 mm  
(42 in x 17.25 in x 18.25 in)  
Net Weight:  
33.5 kg (74 lb.)  
1
Maximum Peak output measured with IEC pink noise at 1 meter in front of speaker baffle under free space conditions. Measurement instrument  
set to peak hold. Speaker muted and released at full power, recording maximum peak level.  
14  
 
PRX518S  
System Type:  
Self powered 18", bass-reflex  
37Hz - 140Hz  
Frequency Range (-10 dB):  
Frequency Response (±3 dB):  
Crossover Modes:  
Crossover Frequency:  
System Power Rating:  
LF Power amp:  
52Hz – 110Hz  
DSP controlled 48dB filter slope  
110Hz  
500 W continuous, 1000W peak  
Class-D, 500 Watt (continuous) at driver impedance  
Less than 0.1% at rated power  
Distortion:  
Maximum SPL:  
129dB SPL peak1  
Signal indicators:  
Overload: Red LED indicates input overload condition  
Signal: Green LED indicates signal presents  
Input sensitivity:  
Input Impedance:  
-25 dBu to 0 dBu  
34K Ohms (balanced), 18K Ohms (unbalanced)  
Polarity:  
0° or 180° phase shift  
LF Driver:  
1 x JBL 2044E 460 mm (18 in) woofer  
Enclosure:  
Rectangular, 18 mm, plywood  
36mm pole socket on top  
Suspension / Mounting:  
Transport:  
2 x die-cast handles with backing cup  
Anthracite DuraFlex™ finish  
Finish:  
Grille:  
Powder coated, Anthracite, 18 gauge perforated steel  
with acoustical transparent black foam backing.  
Input Connectors:  
Balanced XLR 1/4 inch combo jack with XLR loop through. (stereo)  
Dimensions (H x W x D):  
725 mm x 535 mm x 610 mm  
(28.5 in x 21 in x 24 in)  
Net Weight:  
36 kg (79 lb.)  
1
Maximum Peak output measured with IEC pink noise at 1 meter in front of speaker baffle under free space conditions. Measurement instrument  
set to peak hold. Speaker muted and released at full power, recording maximum peak level.  
15  
 
SYSTEM SET UP - FULL RANGE MODELS  
PRX500 Amplifier Input Configuration for  
PRX512M, PRX515, PRX525 And PRX535 Full-Range Models:  
2 3 4 5  
1
EQ  
BOOST  
INPUT  
MIC  
PRX515  
LEVEL  
OVERLOAD  
SIGNAL  
l
POWER  
LINE  
FLAT  
6
7
LINE SELECT  
9
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
100V~ -240V~  
50/60 Hz 5A 600W  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
8
CSA Certificated to operate at 120V in Canada  
~
10  
OUT  
N 1 0 8  
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
Features  
1 - EQ BOOST / FLAT: When set in the “FLAT” position, frequency response is linear and unaltered.When  
“Boost” is selected, internal equalization is applied to enhance low frequency and high frequency  
response. “FLAT” will provide greater accuracy of reproduced music, higher speech intelligibility and  
maximum overall level. “BOOST” is particularly useful at lower levels to enhance pre- recorded  
music. The feature provides flexibility without the need to use an external equalizer. The chart  
(at right) shows the effect of the “BOOST” setting.  
MAIN/MONITOR (PRX512M ONLY): On the PRX512M: Switching between “MAIN” and “MONITOR” optimizes  
the system for use as either a main full-range system, or a stage monitor.  
16  
 
2 - INPUT MIC / LINE: Allows the selection of different input sensitivities to permit the connection of many  
different sources, with or without the use of a mixer or external microphone preamplifier. See “Setting  
Input Sensitivity” on page 18.  
3 - LEVEL: Sound level adjustment. With the input in the “MIC” position the level can be adjusted over a large  
range. In the “LINE” position most typical applications will require that the level control is set at 12  
o’clock. (More details are outlined in “Setting the Input Sensitivity” and “Setting the Gain”).  
6 - POWER SWITCH: Turns the power on. The illuminated logo in the front of the speaker serves also as a  
power “on” indicator.  
7 - LINE SELECT: Allows the user selection for different local voltage ratings.  
8 - AC LINE INPUT: Standard IEC AC mains input connector.  
Indicators  
4 - SIGNAL: Signal indicator. The green LED illuminates when a signal is present.  
5 - LIMIT: Protection indicator. The red LED illuminates when the system overload protection is active.  
Connectors  
9 - XLR: Female balanced XLR and 1/4 inch phone jack combo balanced input connector.  
10 -XLR : Male balanced XLR output connector. This connector provides a full-range signal which can be daisy  
chained to another speaker.  
17  
 
SYSTEM SET UP - SUBWOOFER  
PRX500 Amplifier Input Configuration for  
PRX518S Subwoofer Model:  
2 3 4 5  
1
XOVER  
IN  
POLARITY  
LEVEL  
PRX518S  
0
OVERLOAD  
SIGNAL  
l
POWER  
180  
OUT  
6
7
LINE SELECT  
IN  
9
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
100V~ -240V~  
CSA Certification applies to  
Amplifier Module Only  
50/60 Hz 5A 600W  
LEFT  
RIGHT  
CSA Certificated to operate  
at 120V in Canada  
~
OUT  
10  
8
N 1 0 8  
T5AL250V  
Designed, Engineered and Assembled in U.S.A.  
11 12  
Features  
1 - XOVER IN / OUT: Pressing this button engages a high-pass filter at 110 Hz. This 4th order active filter allows a  
smooth transition between the subwoofer and a full range speaker connected to the output connector.  
2 - POLARITY INVERT: Allows you to set the polarity of the subwoofer to either 0° (no change) or 180° (inverse  
polarity). The correct polarity setting will produce the best blend between the subwoofer and the full-  
range speaker and the strongest perceived bass response at the listening position. This is especially  
useful when the subwoofer is placed at a different distance from the listening position than the full-  
range speakers. If the bass response seems weak, try inverting the polarity.  
18  
 
3 - LEVEL: Sound level adjustment. The 12 o’clock position is a good starting point for most usages. Once the  
full-range system has been connected the level can be varied to match and deliver the desired  
balance (for details see Setting the Gain on page 21).  
6 - POWER SWITCH: Turns the power on. Power “on” status is indicated with the illumination of the logo on the grille.  
7 - LINE SELECT: Allows the user selection for different local voltage ratings.  
8 - AC LINE INPUT: Standard IEC AC mains input connector.  
Indicators  
4 - SIGNAL: Signal indicator. The green LED illuminates when a signal is present at the input connector.  
5 - OVERLOAD: The red LED illuminates when the system overload protection is active. If the input signal is too  
strong or the “LEVEL” control set too high, the red LED will illuminate constantly. Illumination of the  
“OVERLOAD” LED can be avoided by reducing the input level or turning down the “LEVEL” control  
to the point at which the red LED occasionally flickers.  
Connectors  
9 & 11 - XLR: 1/4 inch phone jack balanced input connector.  
(see Reference section page 26 for information).  
10 & 12 - XLR: Male balanced output connector. This connector provides a full-range or high-passed signal.  
dependent on the setting of the “XOVER” switch. In addition to connecting a full-range system to the  
output, it’s also possible to daisy chain subwoofers together.  
Note 3: A single subwoofer can be used with a stereo source. The integral differential circuits sums the low frequency  
information from the left and right channel to a mono signal, ready for reproduction by the subwoofer.  
19  
 
SETTING THE INPUT SENSITIVITY  
PRX500 series systems have been designed to allow the connection of a variety of sources. This provides a great  
deal of versatility, especially with the PRX512M and PRX515, as a microphone or instrument can be connected  
directly to the input. Low levels output from consumer products like MP3 and CD players, can also be accommodated.  
There are two user selectable gain or input sensitivity ranges: Mic and Line. For the majority of applications, the  
system will be receiving a signal from a mixer, equalizer of other professional grade product. In this case “Line”  
should be selected and the “LEVEL” adjusted to the 12 o’clock position indicated by the +4 dB region. The  
“LEVEL”control can then be trimmed to optimize the performance of the system (see Setting The Gain).  
LINE  
When a microphone, instrument or other consumer product is connected to the system, first ensure that the  
“LEVEL” control is at its minimum, anti-clockwise, OFF position. Then select the “Mic” input sensitivity and slowly  
increase the level. If the “overload” LED illuminates you should back the level down again. If the “overload” LED  
illuminates and the “LEVEL” control is barely cracked open then you should try selecting the “LINE” input  
sensitivity range.  
MIC  
WARNING: SELECTING THE “MIC” POSITION WITH THE LEVEL CONTROL IN ANY POSITION OTHER  
THAN THE “OFF” POSITION MAY RESULT IN EXTREMELY HIGH SPLs.  
20  
 
The following levels should be used as a reference if you know the maximum output in dBu of the source  
connected to the system’s input. For each position stated below there is an input signal level in dBu that is  
required to deliver absolute maximum output of the system.  
LINE  
Level Position  
Full “on”  
3 o’clock  
12 o’clock  
9 o’clock  
Input Level Required To Deliver Maximum Output  
+10 dBu  
+17  
+12 dBu  
+17 dBu  
+28 dBu  
+28  
0
+12  
+10  
MIC  
Level Position  
Full “on”  
3 o’clock  
12 o’clock  
9 o’clock  
Input Level Required To Deliver Maximum Output  
-25 dBu  
-18  
-23 dBu  
-18 dBu  
-7 dBu  
-7  
-23  
-25  
0
SETTING THE GAIN  
Only a properly setup system will guarantee maximum performance with a minimum of distortion and feedback.  
(This is as true for self powered systems as it is for passive systems). An easy to rule to follow is:” Everything  
should clip at once.”  
Following these simple steps will ensure you are getting the optimum performance out of your complete system.  
1. Once the source has been connected to the input of your mixer, adjust the input sensitivity (or trim) so  
that the highest input levels are set to just before clip (or when the input LED just starts to flicker).  
2. Position the channel fader for that input to 0 dB.  
3. Position the Master output fader to 0 dB.  
4. With the “Mic/Line” button set to “Line” (because the system is receiving a line level signal, or  
commonly called a +4 dB signal), set the “Level” control to the 12 o’clock position, and adjust until the  
“overload” LED just begins to flicker.  
For in depth articles related to gain structure please refer the website where you can find the JBL Sound System  
21  
 
APPLICATION EXAMPLES  
Basic Sound Reinforcement System  
This is a very basic sound system. PRX500 series speakers allow the direct connection of sound sources,  
without the need for extra mixer or pre-amplifier. The XLR or 1/4 inch input jack provides versatility and cabling  
options and the mic/line input sensitivity selector switch optimizes the speaker gain for the input source.  
Additional speakers may be connected (daisy chained together) in mono mode.  
MP3  
PRX515  
EQ  
BOOST  
INPUT  
MIC  
LEVEL  
PRX515  
OVERLOAD  
SIGNAL  
l
POWER  
FLAT  
LINE  
LINE SELECT  
MP3  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
100V~ -240V~  
50/60 Hz 5A 600W  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
EQ  
BOOST  
INPUT  
MIC  
LEVEL  
PRX515  
OVERLOAD  
SIGNAL  
l
POWER  
FLAT  
LINE  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
22  
 
Music Playback Reinforcement With Subwoofer (PRX512M Pole Mounted On A PRX518S)  
This is a very powerful, but flexible combination. The subwoofer provides the extra low frequency extension and  
also serves as the base for the pole mount. The compact 12 inch satellite system, PRX512M is a perfect match  
to the subwoofer.  
From the master outputs of your mixer route the wires to the subwoofer first and select the x-over in (high-pass)  
option. Route the cable form the subwoofer output connector to the top. Reduce the volume of subwoofers.  
Adjust the volume for the top to desired levels and match the subwoofer volume to achieve desired results.  
This will provide a well balanced LF performance for the system.  
PRX512M  
PRX518S  
Single subwoofer  
application in stereo  
mode (see page 19).  
3
Right Main Output  
EQ  
MAIN  
INPUT  
MIC  
PRX512M  
LEVEL  
OVERLOAD  
SIGNAL  
l
POWER  
MONITOR  
LINE  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
XOVER  
IN  
POLARITY  
0
LEVEL  
PRX518S  
OVERLOAD  
SIGNAL  
l
POWER  
OUT  
180  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
CSA Certification applies to  
Amplifier Module Only  
LEFT  
RIGHT  
CSA Certificated to operate  
at 120V~ in Canada  
OUT  
N
1
0
8
T5AL250V  
Designed, Engineered and Assembled in U.S.A.  
23  
 
Live Performance Or Music Playback Reinforcement System With Stage Monitors (PRX535 And PRX512M)  
This is an ideal system when wide coverage and good directivity is required, specifically in highly reverberant rooms.  
The horn loaded PRX535 3-way system will control the propagation of the sound much better than a conventional  
2-way system. The more directional or controlled the sound is the more independent the system becomes from the  
room acoustics present, resulting in a much clearer sound. The PRX535’s full low end is an additional advantage  
when no subs are used. The PRX512M’s are set to the “monitor” EQ setting.  
PRX535  
PRX512M  
EQ  
BOOST  
INPUT  
MIC  
LEVEL  
PRX535  
OVERLOAD  
SIGNAL  
l
POWER  
FLAT  
LINE  
Right Main Output  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
EQ  
MAIN  
INPUT  
MIC  
LEVEL  
PRX512M  
OVERLOAD  
SIGNAL  
l
POWER  
MONITOR  
LINE  
Monitor Output  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
EQ  
MAIN  
INPUT  
MIC  
LEVEL  
PRX512M  
OVERLOAD  
SIGNAL  
l
POWER  
MONITOR  
LINE  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
24  
 
Large Live Performance Or Music Playback Reinforcement System With Stage Monitor  
(4 x PRX518S, 4 x PRX525 And 2 x PRX512M)  
For larger crowds in and outdoors, a flexible system like this will deliver excellent results. The dual 15 inch  
PRX525 delivers mighty bottom end and crisp highs. The combination of extra PRX518S subwoofers gives it a  
even more thunderous low end. The PRX525’s can be arrayed as pair of two’s each side for a wider coverage  
and some extra SPL (extremely useful in outdoor applications).  
PRX525  
PRX518S  
PRX512M  
Monitor Output  
Right Main Output  
EQ  
BOOST  
INPUT  
MIC  
LEVEL  
PRX525  
OVERLOAD  
SIGNAL  
l
POWER  
FLAT  
LINE  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
EQ  
BOOST  
INPUT  
MIC  
LEVEL  
PRX525  
OVERLOAD  
SIGNAL  
l
POWER  
FLAT  
LINE  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
OUT  
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
XOVER  
IN  
POLARITY  
0
LEVEL  
PRX518S  
OVERLOAD  
SIGNAL  
l
POWER  
OUT  
180  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
CSA Certification applies to  
Amplifier Module Only  
LEFT  
RIGHT  
EQ  
MAIN  
INPUT  
MIC  
EQ  
MAIN  
INPUT  
MIC  
LEVEL  
PRX512M  
LEVEL  
PRX512M  
CSA Certificated to operate  
at 120V~ in Canada  
OVERLOAD  
SIGNAL  
OVERLOAD  
SIGNAL  
l
POWER  
l
POWER  
OUT  
LINE  
MONITOR  
LINE  
MONITOR  
N
1
0
8
T5AL250V  
LINE SELECT  
LINE SELECT  
Designed, Engineered and Assembled in U.S.A.  
IN  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
JBL PROFESSIONAL  
Northridge, CA. USA  
OUT  
AC LINE INPUT  
50/60 Hz 5A 600W  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
100V~ -240V~  
Equipped with Differential Drive®  
Equipped with Differential Drive®  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
Transducer Technology U.S. PATENT 5,748,760  
Other U.S. and foreign patents pending  
CSA Certification applies to  
Amplifier Module Only  
CSA Certification applies to  
Amplifier Module Only  
CSA Certificated to operate at 120V in Canada  
~
CSA Certificated to operate at 120V in Canada  
~
OUT  
OUT  
XOVER  
IN  
POLARITY  
LEVEL  
PRX518S  
0
OVERLOAD  
SIGNAL  
N
1
0
8
N
1
0
8
Designed, Engineered and Assembled in U.S.A.  
Designed, Engineered and Assembled in U.S.A.  
T5AL250V  
T5AL250V  
l
POWER  
OUT  
180  
LINE SELECT  
IN  
JBL PROFESSIONAL  
Northridge, CA. USA  
AC LINE INPUT  
50/60 Hz 5A 600W  
100V~ -240V~  
CSA Certification applies to  
Amplifier Module Only  
LEFT  
RIGHT  
CSA Certificated to operate  
at 120V~ in Canada  
OUT  
N
1
0
8
T5AL250V  
Designed, Engineered and Assembled in U.S.A.  
25  
 
REFERENCE  
Balanced vs. Unbalanced Lines  
Your PRX500 series can accept either type of input. There are two basic types of audio system interconnections  
for audio signals: Balanced and Unbalanced.  
Balanced Lines  
In audio, a balanced line is a three-conductor system in which the two signal wires carry an equal, but opposite  
voltage with respect to the ground wire. The ground wire acts only as a shield and does not carry any audio  
signal current. Outside interference (such as RFI - Radio Frequency Interference) is either shielded from the  
internal signal conductor, or if it gets into the cable is cancelled out by the opposite signals at the receiving  
end. Balanced connections are preferred for any longer cable runs.  
Unbalanced Lines  
Unbalanced cable is a two-wire system where the shield (ground wire) acts as one of the current carrying signal  
conductors. The center conductor enclosed by the shield is commonly known as the “hot” conductor. Unbalanced  
audio cables do not reject noise as well as balanced lines. Unbalanced lines are typical in home hi-fi type  
systems and on the outputs of electronic musical instruments. These work well if the distance between the  
components is short, the signal level is relatively high and all of the electronics used in the system are plugged  
into the same AC service.  
26  
 
CABLES AND CONNECTORS  
XLR/F to XLR/M Microphone Cable  
The standard cable for interconnection of microphone and line  
level signal in professional audio systems.  
• Microphone to mixer  
• Microphone to PRX500 direct input  
• Professional audio mixer to PRX500  
• Daisy chaining PRX500 speakers  
TRS (balanced) 1/4 inch phone jack  
to XLR/M  
For connecting balanced devices with 1/4 inch phone and maybe  
used interchangeably.  
TRS (unbalanced) 1/4 inch  
phone jack to XLR/M  
For connections of instruments with unbalanced outputs to balanced  
XLR inputs.  
TS (unbalanced) 1/4 inch phone jack  
to XLR/M  
This cable is electrically identical to “TRS (unbalanced) 1/4 inch  
phone and maybe used interchangeably.  
XLR/M to RCA (phono) cable  
Connects consumer audio products and some DJ mixer outputs to  
professional audio equipment inputs  
TRS 1/4 inch Phone jack to dual 1/4  
inch Phone jack  
Splits a stereo output into separate left/right signals.  
TRS 1/4 inch Phone jack to dual 1/4  
inch Phone jack  
Change to a TRS mini-phone jack to connect to the output of a portable.  
MP3/CD – player and computer sound cards to a mixer or two PRX500  
speakers for stereo performance.  
XLR/F to XLR/M audio ground lift  
Used to “telescope” a ground to eliminate hum caused by ground loops.  
Use only with balanced in – and outputs  
XLR/F to XLR/M MicrophoneCable  
1
2
3
1 (shield)  
2
3
TRS (Balanced) 1/4Phoneto XLR/M Cable  
TRS (Unbalanced) 1/4” Phoneto XLR/M Cable  
TS (Unbalanced) 1/4” Phoneto XLR/M Cable  
XLR/M to RCA (phono) Cable  
Tip  
Ring  
1 (shield)  
2
3
Sleeve  
Tip  
Ring  
1 (shield)  
2
3
Sleeve  
Tip  
1 (shield)  
2
3
Sleeve  
1
2
3
Center  
Shield  
TS (Unbalanced) 1/4” Phone to RCA (phono) Cable  
TRS 1/4” Phone to dualTS 1/4Phone  
Tip  
Center  
Sleeve  
Sleeve (shield)  
Tip  
Tip  
Ring  
Sleeve (shield)  
Sleeve  
Tip  
Sleeve (shield)  
XLR/Fto XLR/M Audio Ground Lift  
1
2
3
1 (no connection)  
2
3
27  
 
TROUBLESHOOTING  
Symptom  
Likely Cause  
What To Do  
No sound.  
Speaker not connected to  
active AC power.  
Verify that speaker is connected  
and that the circuit is on. Switch on  
power and verify that illuminated logo is on.  
• Re-seat the power cable at both ends.  
• Substitute a known-good power cable.  
Speaker power Cable is faulty  
or improperly Connected.  
Blown fuse.  
• Replace the fuse with the specified value.  
Take your speaker to a competent servicer.  
No sound, speaker is connected  
to working AC power but won’t  
come on.  
Signal source (mixer,  
instrument, etc.) is  
not sending.  
No sound, speaker comes on.  
Faulty cables and connections • Check VU meters on the source mixer  
• Verify that the CD/MP3 is playing.  
• Use headphones to verify that the  
instrument is actually sending an audio signal  
Faulty cables and connections • Disconnect and re-seat signal cables.  
• Replace suspected cable with a  
known-good cable  
No sound with microphone  
connected directly to the MIC input.  
Microphone requires  
phantom power  
The PRX500 speakers do not supply phantom  
power, Switch to a dynamic microphone, use a  
battery in the microphone (if possible), use and  
external phantom power supply.  
Signal Sounds distorted and very  
loud, OVERLOAD light is lit most of  
the time.  
Excessive input signal, trying  
to exceed the capabilities of  
the speakers  
• Reduce the output level of the source.  
• Turn down the level controls on the speaker.  
Signal sounds distorted even at  
moderate volumes, OVERLOAD  
light is not lit.  
Mixer or other source  
is overdriven  
Review the Owner’s Manual for your system  
setup and adjust controls as needed.  
• Input sensitivity (gain)  
28  
 
Noise or hiss heard at output  
Noisy Source Device  
Disconnect the devices that are connected to  
your speaker one at a time. If the noise goes  
away, the problem is with the source or the  
connecting cable.  
Disconnect or mute channels one at a time to  
isolate the problem. Refer to the owner’s  
manual of the faulty equipment for  
troubleshooting help.  
Hum or Buzz that increases or  
decreases when the mixer level  
controls are moved.  
Improper A/C ground or faulty  
equipment connect to  
mixer input  
Faulty cable between source  
equipment and mixer  
Substitute a known-good cable for the  
suspected faulty cable.  
Hum or Buzz  
Improper A/C grounding,  
ground loops  
• “Telescope” the audio ground by using an  
XLR/F to XLR/M adapter on one end.  
• Re-route audio cable away from AC power  
and lighting cables.  
Excessively long unbalanced  
cable run  
• Use the balanced outputs (if available) of  
your mixer to drive your PRX speakers.  
• Use a “DI” (direct injection) box to convert  
your unbalanced equipment output to a  
balanced output.  
Improper system gain  
structure  
Review the Owner’s Manual for your system  
setup and adjust controls as needed.  
• Input sensitivity (gain)  
Microphones are pointed into  
the speakers  
Move the speakers to they do not point the  
microphone’s pickup pattern.  
Speakers feed back and howl whe  
the microphone volume is turned up  
Equalizer settings are  
incorrect  
Locate the feedback frequency and reduce it  
using the mixer EQ or an external equalizer  
Excessive gain  
Reduce the gain at the mixer and move the  
microphone closer to the sound source.  
Recorded music with  
excessive low frequencies  
Switch the EQ switch to “flat”  
Too much low frequencies when  
playing back prerecorded music  
29  
 
CONTACT INFORMATION  
Mailing Address:  
JBL Professional  
8500 Balboa Blvd.  
Northridge, CA 91329  
Shipping Address:  
JBL Professional  
8370 Balboa Blvd., Dock D  
Northridge, CA 91329  
(Do not return product to this address without  
first obtaining prior authorization from JBL)  
Customer Service:  
Monday through Friday  
8:00am -5:00pm  
Pacific Coast Time In the U.S.A.  
(800)8JBLPRO (800.852.5776)  
On The World Wide Web:  
Professional Contacts, Outside The USA:  
Contact the JBL Professional Distributor in your area. A  
complete list of JBL Professional international distributors is  
Product Registration:  
30  
 
WARRANTY INFORMATION  
The JBL Limited Warranty on professional loudspeaker products (except for enclosures)remains in effect for five  
years from the date of the first consumer purchase. JBL amplifiers are warranted for three years from the date of  
original purchase. Enclosures and all other JBL products are warranted for two years from the date of original purchase.  
Who Is Protected By This Warranty?  
Your JBL Warranty protects the original owner and all subsequent owners so long as: A.)Your JBL product has  
been purchased in the Continental United States, Hawaii or Alaska.(This Warranty does not apply to JBL  
products purchased elsewhere except for purchases by military outlets. Other purchasers should contact the  
local JBL distributor for warranty information.); and B.)The original dated bill of sale is presented whenever  
warranty service is required.  
What Does The JBL Warranty Cover?  
Except as specified below, your JBL Warranty covers all defects in material and workmanship. The following are not  
covered: Damage caused by accident, misuse, abuse, product modification or neglect; damage occurring during  
shipment; damage resulting from failure to follow instructions contained in your Instruction Manual; damage resulting  
from the performance of repairs by someone not authorized by JBL; claims based upon any misrepresentations by  
the seller; any JBL product on which the serial number has been defaced, modified or removed.  
Who Pays For What?  
JBL will pay all labor and material expenses for all repairs covered by this warranty. Please be sure to save the original  
shipping cartons because a charge will be made if replacement cartons are requested. Payment of shipping charges  
is discussed in the next section of this warranty.  
How To Obtain Warranty Performance  
If your JBL product ever needs service, write or telephone us at JBL Incorporated (Attn: Customer Service  
Department),8500 Balboa Boulevard, PO. Box 2200,Northridge,California 91329 (818/893-8411). We may direct you  
to an authorized JBL Service Agency or ask you to send your unit to the factory for repair. Either way, you'll need to  
present the original bill of sale to establish the date of purchase. Please do not ship your JBL product to the factory  
without prior authorization. If transportation of your JBL product presents any unusual difficulties, please advise us  
and we may make special arrangements with you. Otherwise, you are responsible for transporting your product for  
repair or arranging for its transportation and for payment of any initial shipping charges. However, we will pay the  
return shipping charges if repairs are covered by the warranty.  
Limitation Of Implied Warranties  
ALL IMPLIED WARRANTIES,INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR  
PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY.  
EXCLUSION OF CERTAIN DAMAGES  
JBL'S LIABILITY IS LIMITED TO THE REPAIR OR REPLACEMENT, AT OUR OPTION, OF ANY DEFECTIVE  
PRODUCT AND SHALL NOT INCLUDE INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND. SOME  
STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS AND/OR DO NOT  
ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS  
AND EXCLUSIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND  
YOU MAY ALSO HAVE OTHER RIGHTS, WHICH VARY, FROM STATE TO STATE.  
31  
 
8500 Balboa Boulevard  
Northridge, CA 91329 USA  
Part Number: 363264-002  
8/2008  
 

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