How do you wire a single sub amp to two subs?

First off make sure you have the amps ran properly. Next to run this set up you need to get some Y jacks from radio shack so both amps are hooked into the subwoofers (preout) on the back of the deck. Next hopefully both your amps are either 2-ch or mono. If it is 2-ch bridge one on each amp this way you use both channels on the amp. If it is mono it is only one channel anyway. Make sure your inline fuse to your battery is big enough, you can't go wrong with ANL fuses 200 amps.

AnswerMight want to also think about a capacitor for sound quality when running multiple amps.

SOOOOOOO were putting 1 amp to each woofer? but if one of your amps have a input and a output jacjs then you would not need the 'Y' jacks?

AnswerI'm running 2 kicker amps, one has 2 kicker 12's and the other has a pioneer 10. I run individual power and ground wires. 1 remote from the deck to the main amp and a wire running from the remote terminals on each amp. Then I have my RCA wires from the deck going to the main amp, and another set of RCA wires going from the output on the main amp to the secondary amp. If you don't have an amp with a RCA pass through, then yes, you will need a RCA splitter (Y cable).