Pros: Cost, Small Size
Cons: Crossover knob does not work
Purchased to add bass to my 2.0 setup with Denon DRA-685 and two Energy bookshelf speakers. Fed the subwoofer a preamp output and turned the crossover all the way down and could not get crossover to go below 120 hz. Added FMOD low pass crossover and it did the job. This should not be an issue to anyone with actual bass management on their receiver. Very happy with the sub after adjustment. Perfect to for overly ambitious 2.1 for my PC.