Hello I have a 2005 Mustang. I recently installed a set of alpine SPX components in the doors and i replace the stock 8's with a set of CDT EF8s 4ohm SVC


I think the alpines can handle 60watts at 4Ohms and the CDTs can handle 200 Watts


I was looking at a Kicker ZX550.3 to run every thing.

RMS Power in Watts
@14.4V, 4Ω Stereo ≤1% THD+N 70 x 2
@14.4V, 2Ω Stereo, ≤1% THD+N 85 x 2
@14.4V, 4Ω Mono, ≤1% THD+N N/A
RMS Power in Watts, Subwoofer channel driven
@14.4V, 4Ω Mono ≤1.5% THD+N 210 x 1
@14.4V, 2Ω Mono, ≤1.5% THD+N 420 x 1

Can i run the alpines on the 4ohm channels (70x2) and the CDT's in parallel give me 2Ohms and put on the 420x1 sub channel.


I guess is what i am asking if the one set of channels are wired 4ohm dose that mean the sub channel needs to also be wired in 4ohm?

 

No you can use the sub channel and run that a 2ohms if the amp is stable at 2ohms(which it should be) and the 2 other channels(stereo) can be run at 4ohms with no problem. The only thing is the alpines will not get 70watts bc that is at 14.4 volts. which with a load on the battery is may run at 12.5 to 13.5 volts or so. So you will be looking at around 40-50watts to each speaker.