The K12 speaker features a 1000-watt amplifier that'll hang with the loudest powered speakers, powering a high-performance 12" woofer and a matched 1-3/4" high-frequency compression driver. QSC's gone to great lengths to make sure that this speaker's output is truly musical. The speaker houses a sophisticated digital signal processor that blends the low and high frequencies, then analyzes and adjusts time, frequency, and amplitude, so you get a remarkably even mix throughout the room.QSC's DEEP™ processing punches up bass response while protecting the 12" woofer from low-frequency transients, while GuardRail™ eliminates bass clipping so your audience won't know when you're pushing your speakers hard. And the K12 makes these adjustments automatically, so you can concentrate on the music.