This Acoustic Audio 7.1 channel multi-speaker system features 7 perfectly matched HD in-wall speakers and one 10" powered home audio subwoofer. The system consist of (6) rectangle 8" HD in-wall/ceiling speakers, (1) center channel HD in-wall speaker, and (1) black 10" powered home audio sub. These speakers were crafted specifically to respond to big bass, deliver extreme clarity and handle major power. Authentic Kevlar components in the woofers respond note-for-note without coloration, and the titanium tweeters ensure you'll hear ultra-smooth voices and precise separation between the instruments. Each 8" surround speaker handles 350 watts of power (175W RMS) while the center handles 350 watts of power (175W RMS) and features dual 6.5" Kevlar cone woofers with a soft dome tweeter. The powered sub sports an 10" down-firing woofer with a Poly Zirconium cone, built-in 400 watt amplifier, downward radiating slot port, LP crossover, hi/low level inputs, and a variable gain control.