How to Split Audio into Two Amps
- 1). Access the amplifiers in the vehicle. Make note of the RCA input locations.
- 2). Connect the female end of one splitter to the male left channel of the RCA cable running to the amplifier location. Connect another splitter to the right channel in the same manner.
- 3). Connect the male ends on the left RCA to the left channel inputs on both amplifiers. Do likewise for the right channel.
- 4). Turn on the system and verify both amplifiers are receiving audio.
Source...