RDL RU-ADA4D 4 Channel Stereo Audio Distribution Amplifier

The RU-ADA4D is a four channel stereo audio distribution amplifier with input and output gain adjustments and input level metering. The module may be operated in mono to provide up to eight distributed mono signals. The inputs and outputs are connected on rear-panel detachable terminal blocks.

Key Features

• Stereo Audio Distribution with 4 Outputs
• Mono Audio Distribution with 8 Outputs
• Front-Panel Input Level Trimmers
• Dual-LED VU Meter for Each Input Channel
• Front-Panel Output Level Trimmers
• Inputs and Outputs on Rear Panel Detachable Terminal Blocks
• Exceptional Audio Quality for the Most Demanding Applications

Technical Specifications

Inputs (2)
Stereo (A/left and B/right) on detachable terminal block
Input Impedance
20 k Ohm balanced or 10 k Ohm unbalanced
Input Level
+4 dBu balanced (nominal), +25 dBu maximum; -10 dBV unbalanced
Input Gain Adjustments (2)
-5 dB to +15 dB (rel. +4 dBu balanced); -3 dB to +17 dB (rel. -10 dBV unbalanced)
Input Metering (2)
Dual-LED VU Meter for Input A and Input B
Mono mode
Rear-panel switch-selectable (input A feeds all 8 outputs)
Outputs (8)
Stereo, A (4), B (4) on detachable terminal blocks
Output Impedance
150 Ohm balanced; 75 Ohm unbalanced
Output Level
+4 dBu balanced (nominal), +24 dBu maximum; -10 dBV unbalanced
Output Level Adjustments (8)
-9 dB to +6 dB (rel. +4 dBu, balanced); -3 dB to + 12 dBu (rel. -10 dBV, unbalanced)
Frequency Response
10 Hz to 165 kHz (+/- 0.25 dB); 10 Hz to 35 kHz (+/- 0.01 dB)
THD+N
< 0.0025% (20 Hz to 20 kHz)
Headroom
> 20 dB (above +4 dBu input or output)
Noise
< -92 dB (below +4 dBu output, 20 Hz to 20 kHz)
Crosstalk
< -90 dB (20 Hz to 5 kHz); <-80 dB (5 kHz to 20 kHz)
CMRR
> 90 dB (100 Hz)
Power Requirement
GROUND REFERENCED, 24 Vdc @ 82 mA (idle, nominal), 120 mA (max.)
Ambient Operating Environment
0 C to 50 C
Case dimensions
5.75" (14.6 cm)W x 1.65" (4.18 cm)H x 3.54" (9.0 cm)D; 3.9" (9.9 cm)D with connectors