My amplifier still hums

[Colin]

I have tried every thing. It is not the earth. It is not the head unit. My next try is to fit a suppresser to the alternator. Does anyone know if this is effective? The humming noise is defiantly connected to the engine revs. I took the car to the halfods hi-fi fitting bod who scratched his head for a while and then went off for a cup of tea. Never saw him again.
Maybe I need a new car!!!

[dazleeds]

try a suppresser mate havent had to use one for years but have in the past and sometimes it will cure the prob if not go check all the main earths on the engine and the amp and stereo etc good luck mate fitting all my stuff soon dreading it lol Daz

[eko]

I had a similar problem last year.
Turned out that the RF leads and Power leads were running along side each other down one side of the car.When i took the RF leads out and rerouted them along the opposite side humming had dissapeared!

[dazleeds]

good point eko

iforgot always run power and speaker wires down seperate side if poss Daz

[Colin]

I have a 325is. The battery is in the boot so the phono leads are no where near the mains lead. All the earth s are fine. I am now considering that maybe the amp is sh#t. I got it of ebay. it is a 1600w four channel amp it was only Ԛ£50.00 but the blurb was good.

[dazleeds]

try the suppressor if not that then you may be right fookin egay any chance you can borrow an amp of good quality and try it out?? Daz

[Andy_magic]

I would try running the car with the alternator belt off before forking out for a suppressor.

If it still there it could be picking up ignition pulses.

I hate to say it, but you could be looking at the fact that it's a cheap amp.