Sound Performance Lab Amplifiers Leaflet

Grapevine  

HeadAmp 4

HeadAmp 4 

The HeadAmp 4 is a high-quality Class A headphone 

amplifi er 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 amplifi er

• Perfect alternative to low-quality amplifi er stages in 

sound cards and entry-level consoles

•  Active line-level signal distributor

The HeadAmp 4 is built in Germany to SPL standards for 

years of trouble-free service, using:

• Internal power supply with standard IEC connector for 

easy, secure AC connection

•  Highest quality potentiometers and switches from ALPS

•  Double-sided PCB for maximum durability and contact 

reliability

•  Rugged metal casing

• High-quality, discrete Class A headphone amplifi er 

circuits

•  Will also power low-impedance headphones 

•  Handles even extremely high input levels, e.g. from other 

headphone outputs

•  Exceptionally low noise and distortion, especially at low 

impedances

•  Switchable input sensitivity

• Four output modes: Stereo, Left Channel Only, Right 

Channel Only, Mono

•  Rear-panel connectors for daisy-chaining multiple units

designed by

Connectors:  

balanced 1/4“ TRS

Input level:  

+21.2 dBu (input -12 dB)

Input impedance:  

10 kOhm

Output impedance:  

50 Ohm

Output voltage:  

600 Ohm/7.4 Veff

                                

300 Ohm/7.1 Veff

                                

150 Ohm/6.6 Veff

                                  

50 Ohm/5.3 Veff

Frequency response:  

10 Hz-100 kHz (-0.5 dB)

THD+N:  

› 

95 dB

Noise:  

› -

90 dBu

CMRR:  

› 

80 dB

Output resistance:  

10 Ohm

Fuse:  

125 mAT

Power supply:  

block transformer, 5 VA

Dimensions:  

19 inch, 1 U rack space

Weight:  

4 lbs