here is my situation. i started the install of my alpine cda 7995. i got all the wires done and then i went to wiring my amp for the rear speakers. the amp im using is a memphis st250d mono class D amp. im using one channel and i spliced it to where both speakers are running from one channel. i got all the rcas hooked up for the rear and subs and the remotes also. when i turned on my car the cd palyer only played bass through the REAR speakers. i had nothing coming out of my sub. i check and played with all the levels on both amps and they both didnt help. im completly confused and really frustrated. i need some help really bad. if anyone can tell me why i have just bass through the rear speakers and nothing at all from my sub, i would be forever greatful. thanks for the time.

jon

 

the gain up on the amp?

 

i set all the levels and tried them all in different places. i figured out the sub, forgot to plug rca's into amp. but then still had all bass in the speakers and barely none in the sub.

 

still sounds like sh#t!!!!!

 

second place i'd look is the head unit itself. some has rca levels that you can adjust. mess with the HU and see if it'll help

 

thats why i wanted some help from guys with the hu. i havent got to mess with it yet. just want to listen to music. could it be the amp for the speakers?

 

Maybe I am missing something but you are running your rear speakers and subwoofer off of the Mono Class D amp? If so you will only get bass out of it considering the crossover point on most mono amps is so low due to being only (some exception of course) for subs.

If you do have 2 amps (one for front soundstage and one for sub/subs) I would still check where your crossover is set on both the amps and in the HU. I know I have a pioneer where if you have certain intial settings you either get either full range or only the lower frequencies(Full mode/ Sub mode for the RCA out). Not sure if this helps but I had a hard time understanding your layout.

 

just get the instruction booklet out and start playing with it. i personally don't have an alpine HU, so i can't help ya there. good luck

 

the amp for the rear speakers only is the memphis, the class d mono. the sub is from my 2 channel audiobahn.

 

Well that Memphis Audio Mono amp was only meant to play signals from 10 hz to 650 hz so I think that is why you aren't exactly getting any highs on the rear speakers. Try wiring that audiobahn to the rear speakers if it is a two channel amp and see if you get full sound( you should). That Mono was never meant to run full range speakers unless you only want tunes from I think 40 hz to 650hz.

 

intel u were right, the memphis doenst have high pass so im gonna have to get a 4x200 or something small to run the speakers. anyone have one cheap? like 60-75 bucks?