Open as PDF
Use RCA audio cables to connect source units with preamp-level outputs to the amplifier; use the supplied bare wire-
to-RCA adapters to connect to source units that don’t have RCA output connectors.
Use a small Phillips screwdriver to loosen the adapter’s set screws and insert the speaker wires into the holes on the
back of the adapter. Tighten the set screws to secure the wires.
Always connect the (+) speaker wire to the (+) terminal on the adapter and the (–) speaker wire to the (–) terminal on
IMPORTANT: Make sure the (+) and (–) bare wires do not touch each other. Touching wires can cause a short circuit
that can damage the source unit or the amplifier.
When you’re finished, plug the adapter into the appropriate input connector on the amplifier.
• You can use either input connector to connect a source component with a single mono subwoofer output.
GTO subwoofer amplifiers include a setup CD with test signals that makes it easy to precisely set the amplifier’s input
gain to maximize the amplifier’s signal-to-noise and dynamic range performance with your vehicle’s audio system. The
amplifiers feature three Gain Indicator LEDs that provide all the feedback you need to quickly set the gain to the proper
Before setting the amplifier controls: Confirm that all connections have been correctly made, reconnect the
vehicle’s negative (–) battery terminal and turn the audio system on.
SET THE CROSSOVER
Before you set the amplifier’s gain, we recommend that you set the Crossover controls for the subwoofer. The
crossover is permanently set for low-pass operation.
The Crossover control determines the frequency where the low frequencies sent to the subwoofer begin to be reduced