help troubleshoot wierd noises left speaker please

Ok very unusual noises and cutting out very intermintent sound like someone was rubbing the speakerwires against a nine volt battery It's like a scratchy poping sound even if you fade sound all the way to rear still does it only that front left does it also it doesn't do it all the time all connections clean and tight I have Polk momo all around and mb quart q series 4 channel amp pioneer prs 80 and stinger rcas all are 3 months old please help me start trouble shooting and eliminating possibilities I really could use help

one of you speaker wires is grounding out somewhere

It happens even with pause on and also on any source, cd usb sd any of these it does it even on pause or volume off and it is only happening on the fron driver side could it be the crossover for that component side?