I just purchased a box/subwoofer off of ebay. Everything seemed on the up and up. After the setup arrived I went ahead and hooked everything up. Sounded great at low levels, but as soon as I started turning it up the bass started bottoming out. Could it be that my box is too big? I'm running a JL 10W3V2, with a Kenwood KAC8402 running at 3 channels. I would think that it would barely have enough power to push the speaker to it's full capacity, but it's bottoming out. The box that I have's dimensions are:
Bottom depth: 11"
Top depth: 6.75"
It's 5/8 MDF.
It's installed in my Jeep wrangler firing downwards. I'd really prefer to get it working right as opposed to buying all new amp, sub, and building the proper box. Is there a way to fill some of the interior space of the box? Is it needed? Any help would be GREATLY appreciated. I'll attach some pics as well. Even just looking at it, it appears to have entirely too much airspace.