poping noise thru speakers, car off

[AGRO_38]

hi guys, installed car stereo, 6inch running thru amp, when i put a cd in a loud pop noise comes thru the speakers and same when i take a cd out, and when i change thru tracks, there is a low crackly noise? the engine is switched off as well. any ideas, its a brand new HU as well? Thanks

[StoneX]

Sounds like a poor/broken ground or blown mute transistors in the head unit.

[Brycestro]

make sure no speakers wires are grounding themselves to anything also

[AGRO_38]

yes the rca ground fuses were blown, from removing the rca leads when on..random sorta thing as pioneer this problem happens alot.