This is from Acoustic Audio's line of Home Theater Series subwoofers. No one knows bass better for home theater systems than Acoustic Audio. This has a down-firing long throw sub with a Poly Zirconium cone for 30% more controlled bass. It also has a 250 WATT built-in Digital Drive high efficiency amplifier housed in an Advanced RFL Bass Reflex cabinet with a slot port. Because of the high-impact low frequency response this sub can produce dead accurate bass from 30Hz - 200Hz. It has an adjustable gain control and a variable crossover so you can perfectly match the bass response with your speakers. The high and low inputs let you use any receiver or amplifier. The black ash cabinet fits with any decor.