Radio Design Labs - RDL RU-ADA4D Radio Design Labs - RDL RU-ADA4D
Radio Design Labs - RDL RU-ADA4D Radio Design Labs - RDL RU-ADA4D

Radio Design Labs - RDL RU-ADA4D Audio Distribution Amplifier

Audio Distribution Amplifier - Balanced/Unbalanced - 2x4 1x8

MFR # RU-ADA4D
Retail Price $330.40
Performance Audio Savings -$90.18
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Radio Design Labs - RDL RU-ADA4D 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.

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 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 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-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.
Radio Design Labs - RDL RU-ADA4D Features
Stereo Audio Distribution with 4 OutputsMono Audio Distribution with 8 OutputsFront‑Panel Input Level TrimmersDual‑LED VU Meter for Each Input ChannelFront‑Panel Output Level TrimmersInputs and Outputs on Rear Panel Detachable Terminal BlocksExceptional Audio Quality for the Most Demanding Applications
Radio Design Labs - RDL RU-ADA4D Specifications
Inputs (2): Stereo (A/left and B/right) on detachable terminal blockInput Impedance: 20 kΩ balanced or 10 kΩ unbalancedInput Level: +4 dBu balanced (nominal), +25 dBu maximum; -10 dBV unbalancedInput 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 BMono mode: Rear-panel switch-selectable (input A feeds all 8 outputs)Outputs (8): Stereo, A (4), B (4) on detachable terminal blocksOutput Impedance: 150 Ω balanced; 75 Ω unbalancedOutput Level: +4 dBu balanced (nominal), +24 dBu maximum; -10 dBV unbalancedOutput 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 CCase 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
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Radio Design Labs - RDL Performance Audio is an authorized Radio Design Labs - RDL dealer.
RDL is the world's premier manufacturer of high-quality audio, video and control modules. The concept of application-specific modules was first introduced by RDL more than twenty years ago... a concept promoting unsurpassed value and performance. A concept which has attained widespread popularity and is a proven success in many thousands of facilities around the world. As the inventor of application-specific modules, RDL continues to lead the industry with solutions to specific problems as well as building blocks of quality system designs.
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