6.7 cubs @ 37 Hz. never played anything lower than 35 hz, you know how u can hear the subs response go bad as it appraoches frequencies that are no bueno with a sine sweep or even just playing tones lower and lower, i made sure to not even come close to that point sinc emy ssf is only at 25hz (its not variable). only played freq's the sub can handle.
the sub has never had any issues before this. it only was getting roughly 2500w (maybe a lil more) off the kx 2500.1 at 1 ohm. that 2500 easily got it to full excursion. the box size seemed to match the sub pretty well since i dont have 4kw to work with and bigger box's are (generally) a lil more efficent. i told tc about those specs and they werent concerned. sub sounded just fine in this box, didnt seem to sound like it was stressed mechanically. never even came close thermally to anything bad
