Hello, I would need a new sub. I am mainly interested in SPL, but should also make good pressure (sound is not sooo important, although a change port comes in, but is mainly adapted to SPL). Requirements: – well suited for BP 4th order! – strongly loadable (should also take part in the burp two linked Ext 3000) – housing size max. 180l net – either 1×15″ or 2×12″ – connection impendance may lie at most at 1Ohm (better would be 0.5Ohm) Actually I would like to n but they are hardly suitable for 4th order (meet only BR and 6th order). That’s why it has to be a “normal” woofer. At the moment I think for example: 1x 13W7 D1.5 2x SPL Pro 12 D2 1x RE XXX 15 D2 (if I find one) Is there anything else? As I said, only the load capacity limits quite a bit… What do you think? MfG, Diddy