I got my AV-15 sub from Acoustic Visions/Stryke Saturday and this thing is a capital M/boldfaced MONSTER both in size and performance. I do not have a rat shack SPL meter so have not calibrated it yet, and cannot give you any numbers at this point, just subjective impressions. It's huge. The guy who dropped it off the back of the delivery truck said it was "140 lbs". Took both of us to get it into the house. It's supposed to be a 24" cube. But it's huge...it's damn near as big as the bass bin on the Klipschorn it's sitting in front of. It DWARFS the Klipsch KSW-15 whose place it took. You could fit 3, maybe 4 Klipsch 15" subs in that enclosure and still have room for some ice and beers. I think the 24" thing may have been the INSIDE dimensions. Since it's made from double thickness 3/4" MDF, that could explain it's outer dimensions. Oh yeah, it's got two 1600 gm 18" Stryke PR's, too: "Gee, it's got lotsa speakers..." I had planned to hook it up to a 700W pro amplifier, but had to use one of the Rythmik Audio 380 watt plate amps instead, because for whatever reason my pro amp (with a pre-amp) will not drive the LFE coming out of my A/V amp. (????) Even supplied with a measly 380 watts this beast easily keeps up with my K-horns now. I now fear for the structural integrity of my dwelling and for those objects which rest inside it. My first impression was you would probably have to pay a couple grand to get something like this commercially. I paid MUCH much less for this... I did not have the tools or the ability to build something like this for myself. The alternative was to have someone build it for me. For anybody who's thinking of buying a "commercial" sub, having someone build one for you doubles or triples the value of your dollar. I considered going "SVS" but glad I settled on this route. Unless you just can't wait and gotta have that sub as soon as you plop down the cash. It was worth the wait for me.