I've just intall my new radio(pioneer DEH-P6800MP) with an amp(infinity reference 7541a),but now i hear the sound of my motor in the speakers,i would like to know why? and how can i fix the problem?
Replies (7)
MrBrownstone on 05/5/2006 12:18:38
What you likely have is a ground loop. If you turn your amplifier gains to their quietest settings, that should give you a good indicator as to whether or not this is the problem.
If the noise goes away, problem solved.
In most cases, it has to do with the amplifier either being poorly isolated, or the gain set at a level that is too sensitive. With Infinity, I wouldn't suspect the first one unless the amplifier was simply defective.
bert96 on 05/5/2006 12:59:39
I took my ground directly on the battery(my battery is in the trunk now)
excuse my ignorance,but,what do you mean by poorly isolated?
swez on 05/5/2006 15:21:02
You may wish to move the HU ground off the factory harness and install it right to the floor pan or firewall. (Bare metal)
Poorly isolated means basically the ground potentials between the HU, any amps and signal processors in the audio chain are not getting the same grounding values. The BAT in the truck, also needs to be well grounded to the floor pan or frame.
Is this your primary starter BAT or an add on for amps ect.? Say more please.
Swez
bert96 on 05/5/2006 21:32:09
It's my primary bat(mustang),i got a really good ground on the floor with a big cable, 1.0 gauge.
i took the ground for my HU from the wire harness,do you i should take it right on the frame?
swez on 05/6/2006 06:25:48
Not frame, but floor pan or fire wall will usually do the trick. (Bare metal)
Swez
bert96 on 05/6/2006 07:41:39
thanks for the info
swez on 05/6/2006 21:08:57
Hope it works out for ya
Swez
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