6Ch Pre-Outs: The PAC AmpPRO AP4-FD31 provides a 6-channel pre-amp output for use with aftermarket amplifiers. Using the factory digital A2B audio data in conjunction with data-bus CAN messages, the AP4-FD31 delivers a variable 5V RMS pre-amp output with fading, balance, equalization, and level control capabilities. Toslink Output: The AP4-FD31 can provide a variable 2-channel fiber optic digital audio output (toslink). Toslink fiber-optical cable sold separately. Non-Fading Level Control Knob: Channels 5-6 (Sub) of the AP4-FD31 are non-fading outputs. The output level of channels 5-6 can be controlled using the supplied level control knob. The level control knob includes a 16' cable which plugs into the interface module and should be mounted in an accessible location at the front of the v...


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