Car Stereos: subwoofer wiring, watts rms, coil version


Question
Well I have a kicker 1000 watt RMS 1 channel amplifier, I was thinking about buying two kicker 12" L7's DVC (750 watts RMS/325 per coil) would I be able to run both subs from one amp having them at a 2 ohm load? also how would I do the wiring to make sure its at 2 ohms?
Thanks.

Answer
Hi Kevin,

It depends on whether you have the 2ohm per coil or 4ohm per coil version of Kicker's L7 12s.

If you have the 2ohm per coil version, you can get 2 ohms by running each coil in each sub in parallel, and then hooking up the subwoofers to the amp in series.

If you have the 4ohm per coil version, your only options are 1ohm or 4ohms (or 16ohm, but you definitely don't want that).

Since you'll have 2 subwoofers that have 2 coils each, with each coil rated at 4ohms, here are the possible configurations:

All 4 coils wired in parallel: 1 ohm (You want this if your amp supports 1 ohm stable -- if it doesn't, don't do it: it'll fry.)
All 4 coils wired in series:   16 ohms (You don't want this.)
The 2 coils on each sub in parallel, and the 2 subs in series: 4ohms.

You'll want to do the last one if your amp doesn't support 1ohm stable.

With 4 4ohm voice coils, there is no way to get to a 2ohm impedance.

Justin