The RDL RU-ASX4D is a four-channel stereo audio selector with input gain adjustments and output level metering. The inputs and outputs are connected on rear-panel detachable terminal blocks.

• The output is the stereo line level. Each output channel may be connected balanced or unbalanced. Each of the VU meters, left and right, is calibrated to read +4 dBu for the corresponding balanced output.
• Rear-panel DIP switches are provided to permanently activate the remote control terminals, to select the remote control mode (sequential or individual source selection), and upon power-up return to either a pre-programmed source or to the last source used. The pre-programmed source is stored when the module is installed
• Local or Remote Controlled Switching Multiple Switching Control Points 4 Stereo Inputs to 1 Stereo Output Line-Level Audio Switching
• Balanced or Unbalanced Inputs and Output Gain Trim on Each Source Controllable Using Various RDL Remote Controls Open-Collector Output for Selected Input
• The RU-ASX4D offers exceptional headroom, low distortion, excellent crosstalk isolation, comprehensive flat frequency response, and extremely low noise with high common-mode signal rejection. It provides outstanding audio performance for the most critical applications in a professional audio environment. The RU-ASX4D operates from 24 Vdc connected through a rear-panel detachable terminal block.

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