Sound Performance Lab Amplifiers technical specifications Grapevine HeadAmp, designed by

Grapevine HeadAmp 4 designed by

HeadAmp 4

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

•Perfect alternative to low-quality amplifier 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

Key Features

•High-quality, discrete Class A headphone amplifier 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

Technical Specifications
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

SPL USA · 2498 Rikkard Dr. · Thousand Oaks, CA 91362. For further information call 805 241 5140, fax 805 435 7455, email info@spl-usa.com or visit www.spl-usa.com