how would you do this? do you just string the amps together using the outs and ins on teh rca ports? like one amp has input from HU take another RCA run it from the out to the other amps in?

you could do that or you could run the rca outs from your HU depending on what kind of HU you have i could run all the rcas from mine

mine might have another out on it i dont remember. cause im gonna get a new amp for subs and use old one to amp some new 6x9's im gonna get.

also how do you connect a fan to an amp so it turns on with the amp and not constantly on?

a relay off of the remote wire.

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