Okay, so I'm coming to all the knowledgeable folks on this forum because my subwoofer is driving me crazy!
Long explanation of my problem:
Let me give you an idea of what my stereo looks like first in case something else is causing the problem. I'm driving a 2005 Honda CRV (automatic transmission, for those who didn't know) and started out just upgrading the stock head unit with a Pioneer stereo (don't know the model number offhand, but can look it up if it's important). Immediately there was a big improvement because, well, the stock stereo was locked and I didn't have the code (bought it used and the dealer never gave it to me; whatever). Being a picky listener of music, I soon grew frustrated at how poorly some songs always seemed to sound, so I bought a super cheap 10 band graphic EQ (Pyramid 903G, I believe), and installed that (and whatever the DIY radioshack parts fix for the accompanying alternator whine problem is). That set up has served me well for a couple years now, but back in Summer when my buddy bought a used Subaru with a gutted sound system and started working on that I told him we should both build our own subwoofer enclosures together. So I built a Bill Fitzmaurice "Autotuba" for my car. To power it I bought an incredibly cheap single channel amp (Visonik something or other). I'm running two 12ga. wires from the battery to the amp to power it because I didn't have any really heavy wire on hand (like a responsible DIYer, I put a fuse between the battery and the amp). Everything else is pretty standard running to the amp (remote start wire to the accessory remote start wire on the back of the Pioneer unit; ground to a nearby chassis bolt (stripped of all paint); RCA inputs from the sub out on the Pioneer to the input on the amp). So anyway, when I turn on my car, everything starts up (with the normal "pop" of everything turning on) and sounds great. But every once in a while the subwoofer lets out another "pop" like when it first turns on. I've quadruple checked all the wires, no bad connections. I think the pops line up with the transmission changing gears (or when the engine idles), which leads me to believe maybe somehow it's getting bleed through from the rest of the electrical system. I tried putting a small capacitor between the power wire and the ground going into the subwoofer amp to try and shunt any voltage spikes to the the ground, but that made absolutely no difference. This occurs even when the gain on the amp is turned down all the way.
Short explanation of my problem:
I put a new amp and subwoofer in my car and it occasionally makes irritating popping noises while I drive, despite otherwise working normally.
Any and all help with this problem would be greatly appreciated. I'm completely at a loss as to how to solve this myself. Thanks a lot to anyone willing to help me out with this!