So, the old post below still applies (and I'm still looking for a solution for that), but things are getting worse.
Along with the popping, the sub seems to cut out sometimes for an indefinite time (which does seem to be a known issue). I only notice this happen while the car is running, however if I turn the key back 1 notch (so the car is off, but the stereo stays on), the sub comes back. If I then start the car, I lose the sub again.
Any ideas why this would happen?
I did notice the Voltmeter is reading 14-15V. Dunno if this has any significance though?
OLD POST: