Amp Has Power But No Sound to Speakers
This might be long winded but I'll start from the top. I had put a 6" Bazooka tube and cheap amp under the rear seat of my truck and they worked for several months. One day the music stopped unexpectedly so I assumed the amp overheated. The next time I drove my truck, I had bass but it cut off after about two minutes. The length of time the sub pushed decreased to about 10 seconds within a few weeks. I assumed the amp was shot and decided to upgrade. I had 2 Fosgate P1 10's that I had used in my Honda that my wife now had in her car. She rarely uses them because of my daughter so I took them back.
I purchased a custom box to fit under my rear seat but the P1's wouldn't fit. I also purchased a used T500 amp from Craigslist as well as a T400 (girl had bought a car with a $2,000 sound system and wad parting it out - I tested them both before buying them and actuallh removed them from her car). Since I couldn't use my new box I decided to hook up the T500 with my P1's in the old box (to hold me over until I could get new subs). All wiring was already in place I just swapped the amp and subs. After initial hook up, I had power to the amp but no sound. I swapped the T500 for the T400 and it worked fine. I swapped the T500 back and it worked fine (I was confused at this point). I ran the subs for about 10 minutes before they cut off unexpectedly. Again, it had power but no sound.
So I've been troubleshooting. I bought new RCA's and ran them directly from the HU to the amp and still nothing. I didn't get as much as a crackle when I plugged them in or removed them. I had a buddy test the connections going into the sub box. Each was receiving 4 ohms (2 ohms if we bridged it). And now I'm out of ideas. I will humor any ideas at this point. I'm about to send my HU back to Pioneer. It's a MVH-P8200BT.