Product Description
RDL RU-ADA8D Audio Distribution Amplifier
Overview
The RU-ADA8D is an eight 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 sixteen distributed mono signals. The inputs and outputs are connected on rear-panel detachable terminal blocks.
Each of the two line level inputs accepts either a balanced or an unbalanced signal. Each input is equipped with a front panel INPUT GAIN trimmer. Input signal levels between -14 dBV unbalanced and +9 dBu balanced may be set to the proper operating level as indicated by a dual-LED VU meter. This assures ample headroom at all normal operating levels. The maximum input level is +25 dBu.
A rear-panel switch selects between stereo and mono operation. In the mono position, input A (left) is used to drive all 16 output channels. When the module is used in a monaural system, only input A must be wired.
Audio outputs are isolated from each other and may be wired balanced or unbalanced. Each of the outputs is provided with a front panel screwdriver adjusted OUTPUT LEVEL control. Relative to a balanced +4 dBu output level, this gain potentiometer allows an adjustment range from -9 dB to +6 dB. Relative to an unbalanced -10 dBV output, each output potentiometer allows an adjustment from -3 dB to +12 dB.
The RU-ADA8D offers exceptional headroom, very low distortion, excellent crosstalk isolation, wide flat frequency response and extremely low noise with very high common-mode signal rejection. It provides exceptional audio performance for the most critical applications in a professional audio environment.
The RU-ADA8D operates from 24 Vdc connected through a rear-panel detachable terminal block.
Recommended Power Supply:
- PS-24AS (USA)
- PS-24AX (International)
Features
- Stereo Audio Distribution with 8 Outputs
- Mono Audio Distribution with 16 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
Specifications
Audio Input | |
Inputs | Stereo input (input A /input B) on detachable terminal block |
Input Impedance | 20kΩ balanced 10kΩ unbalanced |
Input Gain | -5 dB to +15 dB (rel. +4 dBu balanced) -3 dB to +17 dB (rel. -10 dBV unbalanced) |
Input Metering | Dual-LED VU meter for Input A and Input B |
Audio Output | |
Mono Output | Rear-panel switchable (input A feeds all 16 outputs) |
Outputs | 8 x stereo (input A /input B) outputs on detachable terminal blocks |
Output Impedance | 150Ω balanced 75Ω unbalanced |
Nominal Output Level | +4 dBu balanced -10 dBV unbalanced |
Maximum Output Level | +24 dBu maximum |
Output Level Adjustment Range | -9 dB to +6 dB (rel. +4 dBu, balanced) -3 dB to + 12 dBu (rel. -10 dBV, unbalanced) |
Performance | |
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 | < -85 dB (20 Hz to 1 kHz) < -70 dB (1 kHz to 20 kHz) |
CMRR | > 90 dB (100 Hz) |
General | |
Power Requirement | 24 VDC @ 140 mA (idle, nominal), 170 mA max Ground referenced |
Operating Temperature Range | 32 to 122°F (0 to 50°C) |
Dimensions | 5.74 x 1.64 x 3.54" (14.58 x 4.17 x 9 cm) |