This is not your typical Definitive Technology speaker. It is not a bipolar speaker or a tower design. It is a compact, ported bookshelf speaker which uses the same tweeter and woofer as the Definitive Technology 8B. For those looking for a bookshelf speaker it is worth a listen, if you can find it.
I am using it in a home theater system with a Definitive Technology C1B center and BP2 surround speakers and have been pleased with the result.

I have the Definitive Celsius Bookshelf speakers combined with a JBL HLS CENTER, two Interaudio (By BOSE) for surround and a Yamaha SW 300 Subwoofer and I'm very pleased with their sound. It is cristal clear, natural, focused and with a great image. Highly reccomended!!!