Grapevine HeadAmp 4
designed by
HeadAmp 4
Key Features
Technical Specifications
The HeadAmp 4 is a high-quality Class A headphone
amplifier designed for a wide variety of studio and live
applications. Next to the classic multi-headphone situa-
tion for recording, the HeadAmp 4 is also ideal as a:
• Reference studio amplifier
• High-quality, discrete Class A headphone amplifier
circuits
Connectors:
balanced 1/4“ TRS
+21.2 dBu (input -12 dB)
10 kOhm
Input level:
• Will also power low-impedance headphones
• Handles even extremely high input levels, e.g. from other
headphone outputs
Input impedance:
Output impedance:
Output voltage:
50 Ohm
600 Ohm/7.4 Veff
300 Ohm/7.1 Veff
150 Ohm/6.6 Veff
50 Ohm/5.3 Veff
10 Hz-100 kHz (-0.5 dB)
› 95 dB
• Perfect alternative to low-quality amplifier stages in
sound cards and entry-level consoles
• Exceptionally low noise and distortion, especially at low
impedances
• Active line-level signal distributor
• Switchable input sensitivity
• Four output modes: Stereo, Left Channel Only, Right
Channel Only, Mono
Frequency response:
THD+N:
The HeadAmp 4 is built in Germany to SPL standards for
years of trouble-free service, using:
• Rear-panel connectors for daisy-chaining multiple units
Noise:
› -90 dBu
• Internal power supply with standard IEC connector for
easy, secure AC connection
CMRR:
› 80 dB
10 Ohm
Output resistance:
Fuse:
• Highest quality potentiometers and switches from ALPS
• Double-sided PCB for maximum durability and contact
reliability
125 mAT
Power supply:
Dimensions:
Weight:
block transformer, 5 VA
19 inch, 1 U rack space
4 lbs
• Rugged metal casing
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