First this is not a review in the sense that I have no means to measure and therefore this is entirely subjective.
Second this is the first "good" sub I've had and unfortunately my old sub died before I could set it up in this room so I have nothing to compare with in this particular environment.
I'm using a HK AVR 1600 (no room correction) and 5 NHT Super Zero 2s crossed over at 100hz.
Packaging- LAME. The sub weighs 72 pounds which is remarkable given it is only a 16" cube and only the top and bottom of the enclosure is solid. So Def Tec packages this $1500 (MSRP) sub in a single, somewhat thin box with only styrofoam protection on the top and bottom. Nothing on the sides. It's a miracle they make it without major damage. I find this cheap packaging unacceptable at what the sub costs.
I've watched Wrath of the Titans and The Hunger Games on Blu-Ray and The Dark Night via Vudu HDX. The HDX stream LFE channel was so hot I had to lower the sub volume by more than half.
Room size is 13w X 14D x 9H and can be sealed via two doors in opposite corners. I listen with the room closed off.
The sub was placed in the front right corner, 10 feet from the MLP. Interestingly I get very even bass response across the 4 wide sofa. By ear I can find no hot spot or obvious nulls anywhere in the listening area. I thought I would have trouble given the room dimensions.
Unfortunately I've never had a sub in this room before. My old sub died during the move. So I have nothing to compare to.
So- Wrath of the Titans, movie sucked but the sound was awesome. The SC8000 was able to pressurize the room to a level that was starting to make my ears uncomfortable. I don't know what frequency I can hear to anymore but I during the labyrinth scene and the ending scenes with Kronos I could feel pressure without hearing it. There was plenty of tactile feel through the sofa and body. Scenes where Kronos slammed his fist down and sent shock waves through the army where well represented in the room. Pretty good for a such a small non ported box.
Pretty much the same with the heavy LFE scenes in the Hunger Games, especially the forest fire. No complaints with this movie.
However, The Dark Night via Vudu HDX with the super hot LFE track sent the sub into "CLP" being displayed even after I lowered the sub volume by half of what it runs with Blu-Ray. I'm thinking that there was some pretty heavy sub 20hz stuff or really heavy 30-40hz stuff. It's weird because overall the room wasn't pressurized nor was it as loud as either of the other two movies.
I haven't listened to much music with it although what I have listened to sounded fine to me.
I listened to the 2 dub step tracks that are posted in this forum and the sub performed well. I didn't need it to go any louder for sure and don't know if it was producing any of the really low stuff but it certainly filled the room with bass.
I played some test tones via my iPod's head phone jack into stereo inputs. Just based on that the sub does actually make sound at 10hz. You do have to put your ear right up to it to hear it though.
Seriously, based on the test tones I downloaded there is not much at all below 20hz, which I expected. When movie watching I certainly don't know if I'm missing anything. I need to rent War of the Worlds again to watch the emergence scene and see what I get. I'm guessing I'm not going to get a lot since I've read that scene is at or below 20hz.
Over all I'm happy with it. I like the size. The remote is handy. I use it fairly often. The EQ settings are pretty pointless. I don't use them. I tried them and they all make the sub sound worse or just weird.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron