SPL Amplifiers User manual

Grapevine HeadAmp 4
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
designed by
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 [phone], email [e-mail] or visit www.spl-usa.com