Here is want I am trying to do. I want to run my components and sub off the same amp. Here is what I am working with.

Diamond audio M661 components Power Range (watts): 20-170
Imped (ohms): 4

JL audio 12W0 Continuous Power Handling: 125 Watts

JL audio 300/4 amp

Now my problem is I can’t figure out the best way to hook this all up so it sounds good. Is there a way to make this work? Please help me out if you can.
Thanks
Buddy

 

Umm... It's really simple.

Hook the components up to the 2 front channels and bridge the 2 rear channels to the sub (assuming that the sub is 4 ohm).

 

Yeah, the 300/4 makes 75 x 4 or 150 x 2 so the components will get 75 x 2 from the front and bridge the rear to get 150 x 1 to the sub. What are you doing about the rear speakers though? You could either leave them unhooked or run them off the headunit. I'm pretty sure head units let you only use 2 of the channels because I've heard about it being done before, but I'm not 100% and would probably check first. If you leave them hooked to the HU, I would suggest bass blockers since you won't have the benefit of a high-pass on them.