RDL RU-ADA4D Four-Channel Stereo Audio Distribution Amplifier, 2x4 or 1x8

The RDL RU-ADA4D is a four-channel stereo audio distribution amplifier that takes two line-level sources and fans each out to four isolated outputs, a 2x4 layout that feeds a stereo signal to four destinations at once. A rear-panel switch flips it to mono operation, where input A drives all eight output channels to distribute a single mono program to up to eight zones. Input and output gain trims plus dual-LED VU metering let an installer set each stage precisely.

Each of the two inputs accepts a balanced or unbalanced signal from -14 dBV unbalanced up to +9 dBu balanced, with a +25 dBu maximum, and the eight outputs land on detachable terminal blocks at +4 dBu balanced nominal (or -10 dBV unbalanced). With 150-ohm balanced and 75-ohm unbalanced output impedance, high headroom and a very flat response from 10 Hz to 165 kHz, it holds signal integrity across a large distribution run. The module operates from 24 Vdc on a rear-panel detachable terminal block.