hello guys, I’m looking for a stealth box for my a4 limo bj 95, there’s only one that you can put under the hat rack:http://www.carhifidirekt.de/…/subwoofer-stealthboxes-type-related but that’s a little too expensive and I’d much rather have something like this:http://www.carhifidirekt.de/…/subwoofer-stealthboxes-type-related but couldn’t find anything for my cars. Can you have something like that done for a few hundred? Or did you get me a little more bass for another solution? n without having a lot of space loss in my trunk?? have: pioneer 6700MP front: pioneer TS-A131C (13 cm 160W) back: original active speakers (16cm) thank you