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Re: How to install two amps with only one set of rca outputs on head unit
'K. What you need is a crossover box.
I have three amps and only one RCA out from my head unit.
I connect the RCA's from the head unit to the input on the box and another set of RCA cables to one amp for the sub and another set of RCA cables to the amp for the filler speakers and another set of RCA's to the front speaker amp. The box has low input-main input, and high input and low/mid-bass/midrange and high outputs. (Radio Shack el cheapo, but damned effective for what I use it for.)
Most crossover boxes have many switches/adjustments to tailor the sound at all the outputs and adjustable input/output levels.
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