weird noise from speakers sounding like engine

[MYCARcamry]

i hooked up a amp today for my highs finished the install everything sounded great until i was driving the car everytime i step on the gas its like you can hear the engine from the speakers what is causing that how might i fix it?

[cam2Xrunner]

Is it a whining sound? Did you run your RCA's alongside the power wire? You want to keep those two routed on the opposite side of the car from each other. Also make sure you are using a good quality twisted rca.

[MYCARcamry]

yeah thanks thats exactly it

[bigdaddymike745]

hey guys just installed my mmc6500 and have a proble. everyhting sounds really nice but i can hear the buzzing sound when i hit the gas. its not bad but just something that am looking to fix. another thing is when i turn the stereo off, i still hear a sound coming from the speakers. its like a humming sound. anyone kno what it is?

[Silver Streak]

These problems can be very common during stereo installs, but can be avoided as well. It has to do with ground loops occuring and there's many many write ups on how to avoid this. Cam2xrunner has it right separating the power from RCA wires...that's one thing.

Make sure your amp isn't screwed directly into metal...so use some rubber grommets on the amp so the screws don't touch it.

Make sure you have a good ground point in the trunk...if you have mutiple amps, make sure the grounding points are no more than a foot apart.

Use a ground loop isolator if necessary. That plugs into the RCA wires between the head unit and amp. Heck even radio shack sells them, but get a decent one that can handle the amps.

Make sure none of the speaker leads are touching any grounds. Make wires as short and direct as possible. Use good wires too.

I haven't done a full stereo install in 5 years, but those are the major things to look for from what I can remember.

[stanzcam]

also after all that make sure you amp grounds are no more then about 18 inches, and that they are the same size as you power line