Definitive Technology has been a groundbreaking company, offering speakers at budget prices that are giant killers, and that carries over to their line of subwoofers as well.  The SuperCube I is designed to be of reasonable size, yet it puts out loads of deep, accurate and tonally correct bass for your home theater or stereo system.  Definitive has learned a lot in their day and, in fact, made this subwoofer, which is just over 14 inches square and utilizes one front-mounted 10-inch driver, coupled to two 10-inch infrasonic bass radiators. The Definitive Technology Supercube I outperforms Definitive's own 18-inch sub from just a few years ago and, thanks to modern design technology, they have been able to get this subwoofer to extend down to 13 Hertz at a retail price of $1,199.

The SuperCube I is powered by a 1,500-watt class D digital amplifier and comes complete with almost any connection you could ever need, including both high and low level inputs and outputs to make it integrate easily into any type of home theater or music system.   All this performance is packaged attractively with Definitive's piano gloss black end caps over a wrap around grill clothe and weighs in at 76 pounds.    A host of controls round out the package and allow continuous variable phase control, volume and crossover points.  All this come together to make for a reasonably-sized subwoofer that can not only shake the walls for movie soundtracks, but also smoothly and musically blend into stereo or multi-channel audio playback as well.

High Points
• Thanks to Definitive's advances in subwoofer design, the SuperCube I can easily outperform larger subwoofers, making it a great choice for the home theater or audio system where space is something of an issue, yet it will output enough bass to fill even large rooms.
• The vast array or connection options allow this subwoofer to fit into any music or movie system, while the powerful and accurate bass it produces will work equally well when listening to music or watching movies.

Low Points
• Definitive doesn't have any balanced (XLR) inputs or outputs. While these are much less common these days, they still are encountered in both home theater and stereo components and would have completely finished off the connection options.
• The SuperCube subwoofers are only available in black, so this can be an issue where blending into décor is an important factor.

Conclusion
Definitive Technology has hit a home run with this subwoofer, which produces deep and accurate bass with very high output.  The reasonable price and extreme performance make this a great deal in subwoofers even for larger rooms, while the extensive connection options allow it to easily mate to any type of system.  This is a great unit and one you must hear when in the market for a new subwoofer.