I'm in the middle of planning a custom PC case build. I was looking to mount 2 reasonably small car speakers inside the base of the case with the ATX mounting panel maybe an above it, parallel to the base. I'm looking to see if there is a known, effective EMI shielding solution to protect the mobo and hardware from the 2 planned speakers. Basically I'm looking to isolate the speakers and their emi from everything else.