Description
The RU-ADA4D from RDL 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 balanced or unbalanced signals. Each input is equipped with a front-panel trim level. 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 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 to +6 dB. Relative to an unbalanced -10 dBV output, each output potentiometer allows an adjustment from -3 to +12 dB.
The RU-ADA4D offers generous headroom, low distortion, crosstalk isolation, wide frequency response and low noise with high common-mode signal rejection. It provides quality performance for professional audio applications.
UPC: 813721013408
RDL RU-ADA4D Specs
Audio Input
Inputs
Stereo Input (Input A /Input B) on Detachable Terminal Block
Input Impedance
20 Kilohms Balanced
10 Kilohms 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 8 Outputs)
Outputs
4 x Stereo (Input A /Input B) Outputs on Detachable Terminal Blocks
Output Impedance
150 Ohms Balanced
75 Ohms 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
< -90 dB (20 Hz to 5 kHz)
< -80 dB (5 kHz to 20 kHz)
CMRR
> 90 dB (100 Hz)
General
Power Requirement
24 VDC @ 82 mA (Idle, Nominal), 120 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
Weight
Not Specified by Manufacturer
Packaging Info
Package Weight
1.4 lb
Box Dimensions (LxWxH)
6.75 x 6.15 x 2.75″
