popping noise

[westons]

i dont think this has anything to do with the dashdaq, but sometimes when i turn my ignition off i hear a very loud pop coming through the speakers. ive had this happen with older vehicles, the best i can recall it had something to do with ground wire for radio. anyone else had this happen or have any other ideas.

[brad g]

Turn On/Off Thump
Turn on thump can vary from a slight pop to a mind shattering, teeth rattling BOOM! This thump is caused by the audio circuitry stabilizing when power is applied. Most amplifiers and source units have muting circuitry that lasts a couple of seconds to allow these fluctuations to subside before passing a signal. However, if the amplifier un-mutes before the source unit or any other accessory, you better watch out. Here are some things to try if you have turn on thump.

Make sure the amplifiers have a good audio ground reference. In order for the amps to function properly, the audio ground must be referenced to chassis ground at the source unit. If it is not, the amplifier could oscillate. To check for a good ground reference, take a volt-ohm meter (VOM) and measure the resistance between the chassis of the radio and the shield of the RCA line level outputs of the radio. This reading should indicate a direct short. If this is not the case, grounding the shield of the RCA line level outputs to the chassis of the radio will probably be necessary.

Don't install the system so the amplifiers can be switched on when the source unit is turned off.
If you still have thump, add a turn on delay module in line with the remote turn on wire to the amp

I dont know if the factory amp has any adjustments might want to check with ford about the problem

[westons]

thanks man.