E36 sound retrofit

[XnWarden]

I know this has been discussed countless times, but im too lazy to search anymore. Ive got the system designed and it seems cohesive.

My question is about wiring two amps instead of one. I have a dedicated sub amp and an amp for my front component speakers.

Will i need a head unit with two preamp outputs or how is this done? Thanks

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[Twistytee]

You need one with 6 channel outputs. 4V front/rear/sub. So 3 sets of 2 channel twisted wire RCAs if you're running front and rear speakers plus the Mono amp/sub. Or you can buy one 4 channel RCA wire for the speaker amp plus a regular 2 channel wire for the mono amp.