Originally Posted by drivethruecp
I have an Alpine ida-x100 headunit with the recommended harness. All other audio equipment is stock. I read that the rear speakers only work at certain frequencys... Why would that be? I messed with my bass freq to get a rise, but nothing. Also read that it may be that the remote wire needs to turn on both the front and rear... But aren't they from the same amp..?
What are our speaker sizes? I read 6 1/4, but looks more like 5x7 by the grill.
I don't know the sub speaker size.
If you have the factory amp in the floor and have not touched the wires going in or out, only putting a different head unit in - I probably don't have enough info to help. Go over the wiring again - the "rear" wires coming out of your head unit (if any) don't connect to anything in the car - they're a dead end. Everything comes from the front leads to the amp, and are distributed out of the amp to front speakers and rear subs.
Are your front tweeters and door speakers work?