Not sure how accurate WINISD is but it looks like it takes around 1200watts to get these close to xmax. 600watts gets around 14mm xmax in 4cf and in a ported enclosure depending on size and tune.
I think it is better to have more power and not need it than to run something like a inuke 3000 on the ragged edge. For one if you want a quite amp the less your pushing it the less strain and heat and slower fans speed etc. That is how I look at it anyway. But it also looks like you are leaving a decent amount of output untapped if you need it going with the 3000 since you are barely using half of the subs xmax.
Edit, added graph comparing output in 4cf sealed at 600w vs 1500w which pushed it close to xmax. Looks like around 4db left used by going with the 3000 vs 6000 if WINISD is accurate and I have everything entered correctly. If someone already posted these comparisons I might have missed it as I read so many threads on this board
HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520
PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune
iNuke 3000 & 6000 DSP's, Crowson Motion Actuator
Last edited by bscool; 05-16-2017 at 09:41 AM.