The RU-ADA4D is a four channelstereoaudiodistribution 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.
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 dBVunbalanced and +9 dBubalanced may be set to the proper operating level as indicated by a dual-LEDVU 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 8 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 gainpotentiometer 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-ADA4D 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-ADA4D operates from 24 Vdc connected through a rear-panel detachable terminal block.
StereoAudio Distribution with 4 Outputs
MonoAudio Distribution with 8 Outputs
Front-Panel Input Level Trimmers
Dual-LEDVU 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
Inputs (2): Stereo (A/left and B/right) on detachable terminal block
Input Impedance: 20 kΩ balanced or 10 kΩ unbalanced
Radio Design Labs - RDL RU-ADA4D Audio Distribution Amplifier
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