Hi, guys! Well, I’ve already started a thread here, namely this one: http://www.motor-talk.de/t65415/f8/s/thread.html Now I’ve been to the ACR and tried out various bass boxes. Simply cross everything. Tape passes, reflex boxes, closed boxes. My result: everything sounds like shit! Only the loudsärke changes… that can’t be!! Every box just vibrated and buzzed in front of it. Dammit shit! Something doesn’t have to say with my config. Men… However, when I sat in the back and watched the membrane of the woofer, I noticed that it swings very unusually. I have the feeling that she somehow doesn’t really know where she wants to go. She vibrates (very violently) a few times forward and back and sometimes, when a stronger bass comes, he hits out for a short time. A real kickbass however never comes about. The bass sounds more like “DOING”. Very strange. I already have headaches from the most tested and back pain of towing, always the same. I had the lowpass filter at about 60 Hz. However, when I turned on the highpass filter of the power stage and set it to about 180, I noticed that the Membram behaved much better. It was nice and clean with the bass. However, of course, the whole thing was too quiet and you can talk about kickbass. I had as first time an Axton CAB 107 or what the name is (the 12s just) tried out, because a buddy of mine has the same (just the old version). He has installed it in a 3 BMW. So a step-hecklimo, where the trunk is completely closed, and that sounds so awesome. On the other hand, with me only stupid head massage by vibration. Really corrosive… When I sit with him on the back seat, I always have the feeling that it would smash my chest at any moment, but with me it’s more like if ever the moment my head bursts… that can’t be!! Guys, help me!! Please! I’m in despair!! If it helps, I tested these boxes: Axton CAB 107, a few crunch boxes (all closed), a bass reflex by Crunch and ne Hifonics Zeus. I didn’t trust the emphasers, because they would have shot my final stage…