The Ultra 12's look great and everything about them seems to be quality. The grill is one of the most substantial I've seen on any sub, the frame is thick and heavy. You get a set of both rubber feet AND spikes. I used the rubber feet that screw in. They are cone shape with point down. You don't get a lot of fancy features but you do get the basics like auto turn on, phase control, you can use a single or dual RCA connection, you even get an XLR input, and the crossover bypass switch. The only thing I noticed not quite top notch, the power cord is a bit of a loose fit but seems to stay in fine. Already a 12" sub with this type of power and fit, even if it has average performance it's already a good deal for the price.

Here's what I did and this is only about a 14x14 room, I have my Krell integrated driving a pair of Klipsch, Heresy. From the pre out I connected a Ultra 12 to each channel. I also wanted to elevate the Heresy, so I sat each Heresy on a sub. My crossover point was probably around 60Hz. In this set up the Heresy will still get full range. In deed, the Emo subs can perform. I like them for music better than I did my Velodyne but that really isn't saying much as I thought the Velodyne was terrible for music. They don't seem to be as fast and invisible as my SVS but there is significant price difference. Here's what they did though, with something like Marcus Miller with good low end the subs did not distort and the SPL was unreal. I could feel the bass pounding my body like at a Rock concert. The Ultra 12's have some beefy output to keep up with a 250x2 Krell driving 98dB sensitive speakers, the sub's volume is slightly over 12 o'clock. I took the volume around to full and the amp has plenty of additional headroom from where I have my volume set. They seemed to play low with a CD they does a frequency sweep I will have to put more music to them tomorrow. By the time I got them set up and ran some music it was already getting late. Didn't think the wife and kids would appreciate that type of SPL on through the night.

I doubt you can buy a better sub for the money. They're cheap enough I'd recommend two just because you can and the SPL I experienced was a thrill. It's too much hassle to put these in my HT set up just for fun but based on the power and low distortion the Ultra 12 should make an excellent sub for HT.