(ATT Shon!) popping sound from speakers when changing song

[RT/SH]

I just put a different (used) deck in my car, and when there is a small popping or thumping sound from the rear speakers only, when changing a song or turning it on of off. The sound is the same as when you test the polarity with a 9v battery, and once the song is playing, everything is alright.

Any ideas? Possibly a bad ground?

[Daniel-san]

bad ground.

[shon]

Hey buddy. bet ya have an amp in your car, either factory or aftermarket.
The most common reason is an indifferental ground plane. (the negative speaker inputs are showing a resistance compared to the amp ground)
Tell more about the car/system.

[RT/SH]

Hey buddy. bet ya have an amp in your car, either factory or aftermarket.
The most common reason is an indifferental ground plane. (the negative speaker inputs are showing a resistance compared to the amp ground)
Tell more about the car/system.

Hey Shon, thanks for the quick reply! It's just a panasonic head unit with four aftermarket speakers (6" MTX, 6x9 Pinoeer), no aftermarket amp (and it's a 96 civic).

I just took a different deck out of the car and there were no sounds, so perhaps there's a problem with the deck?

[shon]

sounds like it. Ill be at work today from 1 till 5 (on my day off..grr). If you wanna stop by I'll have a look at it. It wont cost ya.

[RT/SH]

alright man, I just may do that. Thanks again for the info