Just because the SUB 25 can be delicate and detailed when called for does not mean that it cannot hit deep and hard when necessary. T-Pain's "I'm N Love with a Stripper" off of his album Rappa Ternt Sanga (Jive Records) did just that, rattling every loose object in my listening room and even some in the adjacent rooms. In short, this subwoofer is refined enough to display small, low-level details, but has the power and reach to hit hard enough to reproduce anything on a movie soundtrack.
When I was done with my critical listening, I hooked up both the SUB 25 and Studio 15 to my surround sound processor, ran the Perfect Bass Kit equalization software on both and watched some of the same movies I had watched with the SUB 25 alone. While I felt the single SUB 25 was more than enough for my room, the dual subwoofers provided a flatter response over a larger area of the room. I don't think that the pair of subwoofers even broke a sweat on the most demanding of material.
I would have liked to see a few more connection options on the back panel. As it is currently configured, the SUB 25 does not provide any way to daisy-chain multiple subwoofers. The SUB 25 does not have separate LFE and L/R inputs, other than its XLR input, nor is it configured to allow it to be connected to both a two-channel system and a multi-channel system at the same time, a la the Martin Logan Descent i. Additionally, those who would like to integrate the SUB 25 into their two-channel system to relieve their main speakers of the lower-frequency load or a high-pass crossover, even an optional external input would have been useful.
The Paradigm Signature SUB 25 performs exceptionally well. It possesses the rare ability to play both deep and hard on the one hand and with finesse and grace on the other. Many subwoofers claim to be capable of both the detail necessary to supplement a high-quality music system and the power to provide the foundation for explosive movie soundtracks, though few, if any, deliver quite like the Paradigm Signature SUB 25 does.