Home > Consumer Reviews > Definitive Technology SuperCube I 120v Subwoofer (Single, Black)

I've owned a lot of powered subwoofers over the last 15 years.
M&K, Polk, Infinity, Cambridge Soundworks, Yamaha, Boston Acoustics, Advent.

None of these, with the exception of M&K have a sub on the market that can touch this subwoofer. Deep extension, oodles of power and sweet looking to boot.
As another reviewer noted, it probably doesn't weight 75 pounds on its own. In the box, yes, thats the weight. Out of the box it's 63 pounds. Still a very hefty sub especially when you consider its crammed into a 14" squared box. I emailed Definitive Technology to get some clarification on the performance specifications on this sub.
Although it's advertised everywhere that it will reach down to 13Hz, the useable frequency response is down to a more reasonable 20Hz -3db anechoic measured. So, in your room you may expect to see this output or even better if your room is on the smaller side (under 1500 cu.ft.)
The 10" driver weighs in at over 21 lbs. That's one heavy driver.
I'm extremely satisfied with the performance and can recommend it without reservation. However, one thing I do have an issue with is the auto-on feature. I like to listen at low volume now and again. When I do this, I lose the bass response in my system because this sub requires a stronger signal to turn it on. I think Definitive kind of blew it on this one by not offering a bypass feature that allows this sub to be constantly on instead of needing a signal to kick it into gear.
Other than that, this thing is truly a stellar performing subwoofer.

The Def Tech SCi is one amazing subwoofer. I wanted to replace an aging, but fully functional 15" Def Tech Powerfield subwoofer that I have owed for 11 years. That PF 15 is also incredible, more than perfect for movies, but lacks the tight sound music requires. It is simply too boomy. So I bought a SCiii originally. I was impressed with the sound quality, but not the HT quality. So I went with the SCi instead. Boy what a difference. My room is 15" x 25" and the little sciii was not up to the task. I went with the big brother, the SCi, hoping that it would meet my requirements, a sub that sounds good with music and home theater as well.
I am more than pleased with the performance of this sub. I was able to get it used for only 600 bones, so I got it at a steal!!
As for the quality of sound, it is a much needed improvement over both my PF15 and the SCiii. The bass drum and guitar on music sounds very realistic. All the low end notes sound more like what the musicians intended.
As for home theater, it packs a punch. Although it does not seem to go as low as my PF15, it sounds better and more realistic. This sub has more than enough power to drive the transducers to the point were my old PF15 seems very ancient.
As for the build quality, it is very well put together in terms of the cabinet. One thing is that the glossy top is detachable and if not properly placed back on top, it will rattle. But that is an easy fix, just use some of the cloth on the spikes and you are good to go.
I highly recommend this sub. I have not heard any other subs in the $1200 range, but I feel that this is one incredible sub.

This was purchased as the sub for a system in which I have 3 Mythos Tens for front left/right/center channels and 2 Mythos Gem XLs for surrounds. I have a longer review of the Mythos Tens for those who are interested.
This is a good subwoofer. Relatively compact, powerful, tight bass response. Easily rattles the walls when I wnat it to in our 14'x20' family room that is open to the rest of the house. In my system I crossover at 80 Hz, which seems to be about ideal for the speakers in use.

Compact cabinet for so much sonic energy created. This sub woofer rocks the house. The first time we heard it kick in we thought the sounds were coming from a truck or plane outside the house. Great controls for cross-over, phase, etc. Good selection of connection methods too.

I have a 12 inch Infinity Sub that is about 9 years old and during my last move it got a small tear in the speaker. The electrics had also fried themselves twice (needles to say I was not a big fan of this unit stock), I came up with the idea of re powering it. No problem uped the power from 100w or so to 240w, and it was back to sounding good. Well it still bugged me that I might be missing something because of the small tear so I found the supercube on sale for $[...] as a demo unit & snapped it up lugged the heavy thing down stairs and plugged it in to my new home theater room (not sure it weighs the 75 or so lbs mentioned on their site but it is probably all of 50lbs).

Wow this thing has some power, don't get me wrong overall I was happy with my old sub but this one has much tighter performance and it can really carry the chest pounding base (much better at the really low frequencies I suppose?). I dropped transformers in set everything to neutral settings and wow everything in my house rattled! I've now got it down to about 30% power and my air ducts still rattle from time to time & when my 5yr old daughter is downstairs playing video games I can see and feel the grates on our stove rattle.

I've had this sub for two weeks now, and I have to admit its too much base for me, I'm not into R&B or heavy base, but there really is a cool factor when I'm showing off the new theater and folks can feel that base flowing though them.

I'm no techie but for some reason the base is not as strong or fourth coming in music as it is in movies & video games (don't even get me started on how cool call of duty is with this thing). Honestly when playing music I really can't tell a huge difference between this and my older infinity other then a bit crisper response (which is nice but I would not know it unless I was really listening for it). However in movies and games this wins hands down. I love to feel the base when I hit a wall going 200mph in burnout paradise and when a ship or something crash's during a movie I can feel the floor shake & my chest move & this some how seems to magically do it with out providing an overpowering amount of base. I'm sure I still need to make some adjustments to placement & settings to get it so that its not too distracting during a movie, but overall I'm happy & I think I'll be able to get it where I want it (under utilized in some folks eyes I'm sure :) )