Aphex 120B | 4 Channel Audio Distribution Amplifier

Model 120B is a high performance audio distribution amplifier with a single high impedance input and four low impedance outputs, all electronically servo-balanced and designed to be as transparent as possible. The 120's transformerless circuits are designed for wide, flat frequency response, free from ringing or overshoot, making it ideal for distribution of time code or audio. Each output has its own amplifier and level control for maximum versatility and isolation. The sturdy steel chassis may be used stand-alone or rackmounted, singly or in pairs.

Technical Specifications

Audio
Frequency Response
5Hz - 100 kHz (+0, -0.5dB)
Dynamic Range
94 dB
Hum and Noise
Better than -90 dBm at unity gain
THD
0.002% @ +4dBm, 0.005% @ +20dBm
IMD
0.002% @ +10dBm
Channel Isolation
70dB
Slew Rate
13 V/usec

Input
Connector
XLR 3-pin Female
Type
Transformerless, differential servo balanced
Impedance
100k ohms balanced
Maximum Level
+25 dBm
CMRR (typical)
> 45 dB

Output
Connector
XLR 3-pin Male
Impedance
65 ohms
Maximum Level
+25dBm into 600 ohms balanced, +21dBm unbalanced
Output Gain Range
±15 dB

Other Specifications
Power Requirements
100, 120, 220, OR 240 VAC, 50-60Hz
Dimensions
1.75"H x 8.25"W x 7.25" D (44.5mm x 209.5mm x 184.2mm)
Net Weight
3.5 lbs (1.6 kg)