I just bought 2 L7 15s off craigslist and there the 08 black ones dual 2 ohm subs for 375, well they look great, in great shape, well i got home and hooked them up and tryed free air first, and i first hooked them up to a 2 ohm load and couldnt hear anything, then ran them down to .5 ohms and could barely hear a thing, then i put them in the box and i can play them just for a second at low volume then when i turn up the volume or bass boost then pop alittle bit and cut in and out what is the problem with them? thanks