PreSonus StudioLive 315AI 15" woofer, 8" midrange driver, 1.75" titanium compression driver 2,000 Watt, triamped, Class D amplification 32-bit, 96 kHz DSP, more processing power than 3 rack processors Temporal Equalization and Coaxial Speaker Coherence Alignment 4 operation modes; Normal, MP3, Floor Monitor and User