Thread: humming

Originally Posted by RedGTiVR6

have you matched your gains on your amps?

erm, not sure what you mean, i turn the gain up so it sounds bout right, this hum is when it should be silent, so what the opc thinks is silent the amp thinks is a hum...

Ralph

Originally Posted by Ralphh85

erm, not sure what you mean, i turn the gain up so it sounds bout right, this hum is when it should be silent, so what the opc thinks is silent the amp thinks is a hum...

Ralph

do you have any audio lines running in tandem with power lines? Power curent causes feedback...AC current usually causes a pulsing sound out of the speakers....but a DC curent will produce a level hum.

I had this problem with my audio too. Come to find out it was bad pre outs on the cd player. id check that out, it could either be that or like a few have said make sure your audio wires are on a different side of the car as your power wires. You can get nasty engine noise if you cross them.

if you sand the paint of a spot on the car completly and then ground the wire back you should loose all extra ground noise

Originally Posted by Ralphh85

im running M2 ATX/jetways F4/sony amp.

when i turn the pc on half way through the boot screen when it says windows is starting.... this slight humming can be herd, i think it coinsides with when windows starts its sound device.

how can i stop this?

i notice theres a 0.05v difference between negetive on both sides of the M2 ATX, so the mother board and the amp have slightly different megetives, could this be the prob?? would it fry anything if i grounded negetive out on the PSU and on the car?

cheers
Ralph

sand all the paint off the spot where your ground is. and if that doe=nt work. tru=y using a different spot or a bigger ground wire.

Originally Posted by RedGTiVR6

http://www.350z-tech.com/zwiki/Tutor...plifier_Tuning

Please tune your amps properly first.

i have never ever had this problem before and have had many different set ups in different cars.

the negetive of the amp and psu input are both soldered to the main 16mm2 cable which runs from battery in boot to the engine int he front. so a very good earth connection.

also the amp is right next to the pc, with only a 1m jack to phono cable connecting them so should be good connection there to?!

cheers to thoes trying to help
Ralph