Need Help With Amp Swap 95 Gsx

[antlip]

So I have a pionner head unit, memphis speakers all around, audiobahn subs, mojo amp. All that was in my car working fine. I went to take out the stock amp and throw in my highs amp. We wired it right from the old amp harness and cut the 8 in back of the head unit to make it work right without running wires from the speakers directly.

NOW.... everything is in and the highs speakers are messing up. The rear speakers are making a super charger spooling sound only when the car is running. I was told its whinning from the amp power. So we did a direct ground off the rca wires. Lowered it a bit. Then we switched the rca cables and it was still only the rear speakers. Also now my subs seem to have lose quit a bit of power.

Can anyone tell me how to fix the super charger whinning noise out the rear speakers and where did my sub power go? We didnt even touch the subs or the amp not a single thing to do with it!

Oh 1995 gsx with infiniti (spelling) system. Please shed some light on this problem so I can have rear speakers and my sub power back. Last but not least this damn super charger sound from my trunk!!!!!!!

 

[kenamond]

So I have a pionner head unit, memphis speakers all around, audiobahn subs, mojo amp. All that was in my car working fine. I went to take out the stock amp and throw in my highs amp. We wired it right from the old amp harness and cut the 8 in back of the head unit to make it work right without running wires from the speakers directly.

NOW.... everything is in and the highs speakers are messing up. The rear speakers are making a super charger spooling sound only when the car is running. I was told its whinning from the amp power. So we did a direct ground off the rca wires. Lowered it a bit. Then we switched the rca cables and it was still only the rear speakers. Also now my subs seem to have lose quit a bit of power.

Can anyone tell me how to fix the super charger whinning noise out the rear speakers and where did my sub power go? We didnt even touch the subs or the amp not a single thing to do with it!

Oh 1995 gsx with infiniti (spelling) system. Please shed some light on this problem so I can have rear speakers and my sub power back. Last but not least this damn super charger sound from my trunk!!!!!!!

I ordered my TSi-AWD with the lower-end system, since I knew I'd be replacing it right away. Think it just had a cassette deck, but had the 6 speaker setup.

Sounds like alternator whine. I ran all of my amp power down the center of my car (under the center console - huge cable) and the head unit preouts and CD changer cable down the right side (under carpet) and the return speaker wires from the amps back up to the front (tweet and door) speakers on the left side. This separates the low power preouts from the speaker wires and the amp power cable so that the signal isn't affected by the speaker or amp cables.

I wired my head unit to the stock harness (bought the correct harness/plug and wired the same-colored wires together) except for the front speaker wires which I ran down the left to the back to the 4-channel amp. The rear speakers and subs were wired straight from the amps in the trunk (rear speaker wires ran under the rear seat cushion, and sub wiring stayed entirely in the trunk). My amp power/red cable (HUGE) bolted to my battery with a huge fuse, and I forget where I put the amp ground cable (HUGE), but it's probably bolted to some huge bolt in the trunk area.

I hear NO alternator whine nor have I for the 9 years since I installed it.

 

[Weenie4]

So I have a pionner head unit, memphis speakers all around, audiobahn subs, mojo amp. All that was in my car working fine. I went to take out the stock amp and throw in my highs amp. We wired it right from the old amp harness and cut the 8 in back of the head unit to make it work right without running wires from the speakers directly.

NOW.... everything is in and the highs speakers are messing up. The rear speakers are making a super charger spooling sound only when the car is running. I was told its whinning from the amp power. So we did a direct ground off the rca wires. Lowered it a bit. Then we switched the rca cables and it was still only the rear speakers. Also now my subs seem to have lose quit a bit of power.

Can anyone tell me how to fix the super charger whinning noise out the rear speakers and where did my sub power go? We didnt even touch the subs or the amp not a single thing to do with it!

Oh 1995 gsx with infiniti (spelling) system. Please shed some light on this problem so I can have rear speakers and my sub power back. Last but not least this damn super charger sound from my trunk!!!!!!!

I had the same problem. This thing works perfect. I can't even hear the whine at all. They have them at your local walmart. It only takes bout 15 seconds to fix. (Its really cheap too)

http://walmart.scosche-cars.com/products/?search_constraint=1&search_query=Scosche&sfID1=132&pg=3&productID=1528&walmartProductID=896355

 

[TSIMonsteR]

I just took the amp out. When I installed my new amps (2 2channels) I just used all new wire from the speakers to the amp, and to the new head unit. No problems at all

 

[spatulahunter1]

I had the same problem. This thing works perfect. I can't even hear the whine at all. They have them at your local walmart. It only takes bout 15 seconds to fix. (Its really cheap too)

http://walmart.scosche-cars.com/products/?search_constraint=1&search_query=Scosche&sfID1=132&pg=3&productID=1528&walmartProductID=896355

a ground loop isolator isnt much different than what he did by already grounding his rca wires. It may be worth trying but if he already grounded them and it didnt help much then an iisolator usually wont do anything

 

[Weenie4]

a ground loop isolator isnt much different than what he did by already grounding his rca wires. It may be worth trying but if he already grounded them and it didnt help much then an iisolator usually wont do anything

Sorry, i didn't see that

 

[Weenie4]

Did you run the power cable and rca wires close to each other?

 

[antlip]

Update... I went and bought new RCA wires and the ground isolator boxes. I first hooked up 1 ground box to the front speakers and 1 ground box to the rears. This instantly cleared everything up 100%. So I figured why not try the new RCA cables too. I hooked them up and just ran them down the center of my car, not near any power wires or anything. It was identical to using the original RCAs already in the car. I went to install the head unit back into the dash and stuffed the ground boxes under it and the sound went nuts and made super amounts of noise.

Now I have the head unit in the dash, and the ground boxes sitting next to my shifter haha. The whinning noise is 100% gone but now my car looks like crap and I cant figure out how to install the ground boxes in my dash with out the noise coming back.


I have 1 set of RCAs running wire the power and the other 2 away from it. This isnt my problem though as you just read I fixed it with the groudn boxes and found no difference in running 2 sets of RCA wires through the middle of my car.

 

[RedTurboEclipse]

Good to see you fixed your problem. Were your new RCA wires any good? I hear if you buy those expensive quality rca cables, with all their claimed shielding, twisted etc etc, that you can run it a long the power cable with no noise. I have no exp, with the 4 channels, but I do have experience with the sub non fading output. I have a rockford fosgate twisted "supposedly really good insulated" rca, running along the my 4 gauge power cable and no noise. So I install my 4 channel amp, and use these cheap rca cables that came with the kit, and there is noise.

To test it, use a set of rca cables not used, just take out the ones connected, plug in your extra ones. if the noise is gone, its the rca cables. Looks like you solved the problem though. Make sure to sand down your grounding points.

Just a question for you, since you used grond loop isolators, did you notice any difference in sound quality? or was it the same minus the noise? Give us your opinion? also which one did you go with?

 

[antlip]

Well I have the rockfard fostgate (spelling) RCAs from best buy. I bought the whole install kit for both amps and it was over 100 Bucks a couple years back. Once I get everything to be 100% clear and all put back in the dash I will listen for sound quality. As far as being able to tell between having and not having the ground block (which I bought from walmart like mentioned above 13$), I will never be able to tell. I couldnt even listen to the radio with out them since the sound was so bad. I did buy a cheap set of RCAs for like 17$ from walmart just to make sure it wasnt the RCAs. If it was, I was going to buy the like 80$ set which your talking about and return the walmart set.


EDIT...... Wanted to add the 2 car audio stores by me both had the ground loop isolator kits for 12$, I figured it had to be the same quality but I wasnt able to make it to either one in time. Good old walmart is always open.

 

[RedTurboEclipse]

antlip, did you get a chance to try out the ground loop isolators and compare the sound quality? did it degrade it at all?