How do I keep motor noise from being picked up by the stereo? I have two hot wires coming directly off of the battery to the Amp and Sub (located in the trunk).

It's pretty noticable when the stereo is turned down or even off. It's kind of a whineing sound that gets a little higher when the AC kicks on or if the blinkers are working. Can't hear it at all when music is being played, so I may be able to live with it. It would be nice to not hear it at all when the stereo is off though.

I also get a real loud thump when I turn the stereo on when the motor is running or the ignition is on, but I just think that that's from the amp being turned on.

Thanks

 

It is most likely a ground problem, check your ground wires and try moving them to different places. As for the thump, good luck with that.

 

I had to ground my RCA connectorS on the back of the head unit!

 

i'm assuming you have a stock system and have just an amp and sub combo right?

and what do you mean by TWO hot wires running to amp in trunk?

 

Two Hots running directly from the batt to the trunk. One for the amp and one for the sub, with a built in amp (Infinity Basslink).

I was hoping to be able to put in some kind of noise suppressor as apposed to riping the deck out again.

Thanks

 

email me again, with more detailed description of what you installed (or had installed) and how it is installed. I can help you out.

 

yeah, i got some ?'s to ask you before really making a huge response to what i think the problem could be... cut and paste what you mailed to 'sumkid...' about ur detailed install description... i ran into lots of electrical problems when installing stuff before... i'd like to help you out. laters. -ak

 

just kinda weird because with just a stock system and an amp/sub in the trunk and ur getting engine noise?

try disconnecting the sub and try to determine whether the noise is from your sub or not... if its coming from your sub, then that's certainly not a good sign. instead of a loop isolator or noise suppressor, just try tweaking the X-over and see where the frequency of the noise lies and try to filter it out.

 

Akim711, that is a good idea but I don't know if it will work in a car since they run on Alternating Current. There would be a range of tones to notch out.

 

Your car runs off your home electrical system?? Cars are DC, or direct current, one of the biggest reasons we need 4 gauge cable to get good power to a large amp in the trunk!!

Woodek- I imagine your biggest problem is that the power wires are running down the same side of the car as the sound wires. Because the stock deck puts out such little power, noise is very easily introduced into the sound wires. If this is the case, try running the power wires down the oppisite side of the car, that should solve the noise problem. Also, make sure that your 2 amps (basslink and your mid/high amp) are grounded to the same point... it sounds weird, but it makes a big difference.

 

Yeah my bad, I get those confused. I don't know anything about DC.

 

Wow, Thanks for the replies.

Sorry I haven't gotten back for responses. I've been pretty tied up lately and haven't been on the home computer in a while.

One of the problems with my delimema is that I didn't install the system. I can only go with what the installer told me from casual conversation. I know he had to put some kind of adapter behind the head unit, I believe to run new wires to the amp and sub. He had to modify the adapter to allow the steering wheel controls to work. He said the wire has a varible resistor somewhere, to allow the one wire to control all of the functions on the steering wheel. Pretty cool stuff.

Anyway, I'll tear into it a little this weekend, so I have a better idea of what was installed, and maybe be able to track down the motor noise I'm hearing.

I'll check the ground for the sub and amps, Check the run for the hots coming from the engine and head unit, and the connection for the sub.

Thanks for the responses! I got more than I planned and should be able to fix it with this info.


Thanks again.

 

how did you ground those RCA connectors at the back of the head unit?

thanks in advance

hg

 

woodek:
One other thing you can do...that I would suggest everyone should do...run balanced line. Go grab a converter that'll convert to balanced line...and another converter to convert back if your amp can't take balanced line. Balanced line basically will subtract the signal in one line from the other, effectively cancelling any noise (or drastically reducing it). For higher SQ, try that.

Austin519

 

the problem is that your rca wires/ high imput (wichever you use) is running close to somthing powered, ie. power antena, power wire to amp, power windows, alarm. try runing rca's through middle, usualy there is no interfearence.

 

which side do the factory inputs for the factory amp run down?