I can hear my RPMs in my speakers - BMW Forum

///M Power · 11-08-2005, 12:23 PM

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95 e36 m3

i hear a slight whine in my speakers. as i rev faster it icreases

only does it when using CD player. doesnt do it during radio.

i have a 6 disc cd changer in the trunk.

whine is very quiet and u have to listen for it to hear it

i also have a external aftermarket amp in the trunk.

what the hell

thanks

da_bull · 11-08-2005, 09:53 PM

If the amplifier runs the factory location speakers try turning the amp's gain down a notch. This will reduce the amount of input going into the amp, therefore possibly reducing the noise. If its really slight, an RCA filter may reduce the noise as well. Do the gain thing first, its a better solution than the bandaid-RCA-filter. Lemme know...

Passatie · 11-17-2005, 03:09 PM

Try a ground loop isolator or if your using a amp, run the rca cable down the side of the car without the amp power lead. The power leads create a magnetic field and this can be heard through the RCA lead

hope this helps

superdeadman · 11-19-2005, 01:06 AM

messed up ground wiring?

///M Power · 11-19-2005, 01:16 AM

Whats this stupid amp anyways. Where is it connected to and where are these wires goign to? I dotn need this how do I take this crap out of my car?

da_bull · 11-19-2005, 05:11 AM

after re-reading your post, lets start over...what is aftermarket and what is factory? is your amplifier only running a sub or does it run your mids too?

Passatie · 11-23-2005, 05:26 PM

Quote:

Originally Posted by ///M Power

Whats this stupid amp anyways. Where is it connected to and where are these wires goign to? I dotn need this how do I take this crap out of my car?

If you have an external aftermarket amp and its not being used then take it out of the car cos believe it or not it puts a drain on the battery anyway, even when its not in use. Most amps are 12v but use up to 14.4 which is what you alternator puts out, same kinda thing as when you put your air con on, you feel a slight dip in the electrical system but the amp does that from the minute you start the car

Im a car audio fitter and 99% of most interference noise is from badly grounded amps, the only way to get GOOD ground is straight to the body with its own ground and not sharing one with another electrical item, if our customer will not allow this we advise a ground loop isolator and they are very cheap, radioshack i think is the american supplier, over here its maplins

If you need one i will get AQUIRE one from work for you and ship it over free of charge, thats how cheap they are