Sound Performance Lab Amplifiers User Manual

Grapevine HeadAmp 4

designed by

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 situa­tion 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

Key Features

• High-quality, discrete Class A headphone amplifi er
circuits

• Will also power low-impedance headphones

• Handles even ext remely high input levels, e.g. f rom 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

Tec hnical Specifi cations

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:
Noise:
CMRR:
Output resistance: 10 Ohm
Fuse: 125 mAT
Power supply: block transformer, 5 VA
Dimensions: 19 inch, 1 U rack space
Weight: 4 lbs

› 95 dB
› -90 dBu
› 80 dB

SPL USA · 2498 Rikkard Dr. · Thousand Oaks, CA 91362. For further information call 805 241 5140, fax [phone], email [e-mail] or visit www.spl-usa.com