Boxed it today, 1.3 @ 34Hz, Wow... no joke, very nice response, solid, clear and powerful sound. Handled 600 easily and was forceful enough to move clothing from outside the car with the door all the way open. Box is sub up port back, 39sq" port area and no noticeable vent chuff so mach was good @ .04. After breakin and listening, it may not be the most transient, loudest, or lowest hitting sub for the price, but it's definitly a helluva contender. Out SQ'd and SPL'd my RD Alpha V3 10D2 on 1600 rms, with only ~ 600watts to it. I'll let ya know full settled break-in tsp's after its been beat on for 30 hours or so, prob 2-3 weeks. Bandwidth was surprisingly flat from 32Hz up to around 80Hz and blended fair, not focal transparent but def not AQ muddy either!