Pics are up below NOTE: This whole project was built with a circular saw, gorilla glue, a brad nailer (you could use screws or nothing if you have enough clamps) on the floor of an unfinished room in my basement. My point? There is no excuse for you not to do a DIY box, now get to work. Well I picked up a Kicker 15" L7 with less than an hour of play time on it for a price I couldn't refuse, $110. I have always been skeptical of square subs. Still I have heard some of the 10" L7s in some high end car audio SQ installations that sound really good. So tonight after my friend and I got done framing in my downstairs bathroom we decided to build the box I designed for the sub. I started with the 6 cube box design on kickers website. The tuning frequency is right around 33 Hz. I modified the port dimensions using bass box to get it down to ~21 Hz. This makes for pretty flat response down to tuning. Needless to say this box is a monster. Construction on the front panel, back panel, top and bottom is all 1" MDF, the sides of the box are 3/4" MDF. This was just some free scrap wood that I had lying around. We braced the box substantially and it weighs in at 86lbs before the driver. While I think the bracing will be sufficient, if the box resonates I am going to stiffen it with more bracing and fiberglass resin. The box went together well considering all we had was a worm drive circular saw to do the cuts. My friend is a great carpenter. You'd think we had a table saw, the joints were that tight. We glued it together with gorilla glue and used brad nails and clamps to keep it all together until it dried. I went ahead and sealed all the seams with liquid nails (overkill since gorila glue expands) just in case I want to plug the port in the future. Modeling shows I should be able to get up over 105 db down to 20hz with this badboy in my HT room. Unfortunatly I didn't have the RCA-1/4" adaptors to hook my QSC amp up to my reciever to give it a listen. This is the cruelest torture I have yet to face. Haveing a monster sub with no way to hear it in the HT. That said we took it out and hooked it up in another friends S-10 blazer with a JL 1000/1. All I have to say is damn. This sub has authority, serious authority. It'll be nice to hear what it sounds like inside the HT as it took nothing to get crazy SPL out of it in the car. Now it isn't as accurate as the owners single 10w6, it seems a bit slower at lower volumes and at higher bass frequencies. My guess is some phasing issues with the port, as soon as you turn up the volume the attack is much better? Any guesses on why this could be? Perhaps an accoustic anomoly with the S-10? We hooked the sub up outside the S-10, just sat it on the ground and let it play, I think it would make a pretty decent PA sub as the bass is just huge. I'll let you know how it sounds on the HT as soon as I get it hooked up. I'll post pics of the construction on Monday. My biggest fear with this sub is that it is just going to be too "muddy" sounding. While I am confident in the subs abilities in the lowest ocataves and playing Rap and Industrial metal, I am worried about overal sound quality. I'll let you guys know, either way it was a fun way to spend a couple of hours and if anything the pure size of this sub makes a statement.