The SB-900 and 900DF are the perfect companions for any Home Theater or compact music system and they’re an ideal match for an Atlantic soundbar. One big reason is this: In addition to the normal “compressor-limiter” distortion-reduction methods, Atlantic has developed special circuitry that actually eliminates the deleterious effects that the enclosure itself has on the sound. We call this Clear Filter technology, or CFT. That’s why other subwoofers, regardless of their power ratings or their limiters, can’t match the sound of an Atlantic subwoofer for detail and musical accuracy. The SB-900DF (“Down-firing”) has its woofer on the bottom panel firing down onto the floor, where it can take best advantage of the acoustical phenomenon of “floor coupling” to reinforce its low frequency response and impact. This is particularly advantageous when placing the 900DF’s compact cabinet into tight spaces behind furniture where you don’t want the woofer facing right into the back of a sofa, for example. With either one, you get the same great performance from a compact enclosure at a price far less than you’d expect.