Re: My Pionner HU output power *****
With MOST decks multiple sets of RCAs are full range front and rear outputs. Some decks have 3 sets and are for front/rear/subwoofer. Higher end decks that have 3 can be ran in NETWORK mode and the outputs switch to High/mid/low.
Now some amps have an output (a.k.a. thru-put) as well as an input. That means you can run your 1 set from your head unit to the amp's input and then run a seperate rca out of the output of the amp to the input of another amp. If you want to run 2 amps that don't have this feature and your deck only has one preout you will have to use Y adapters. I would NOT connect anymore than 2 amps in this way because you're actually splitting your preout voltage when you do this. So splitting it once will not be that big of a deal but a bunch of times will start taking its toll.
Source Unit: Pioneer P9 combo
Tweeters: CDT DRT-25 Silk
Mids: CDT ES-5 (5.25")
Midbass: CDT M6 (6.5")
Subs: Pioneer TS-W12PRS
Mid & Tweet amp: Pioneer PRS-X340
Midbass Amp: Pioneer PRS-X720
Sub Amp: Pioneer PRS-X720