So: Now the meeting is over and I want to slowly start looking for a suitable subwoofer…. The specifications are: max 20er diameter, the depth should be as flat as possible he has to play clean and should not be too expensive. max 150 € I wanted to build the housing myself, because there is no suitable one anyway. Have already thought if I should build this first and then see how much liters I get together, because with me it is very cramped, because I have the sub behind the passenger seat, the advantage is that I only have half a passenger cell I don’t need such a large sub to sound enough, as a front system I have the Rainbow 265 slx in it.