The SRM450v1 includes one 300-watt amp for the 12" subwoofer and one 100-watt amp for the 1-3/4" titanium compression tweeter, so you get plenty of output for any gig. Mackie combined the efficient and responsive Class D amps with digital time alignment, phase correction, and EQ circuitry that seamlessly match the amps' output and the speakers' power handling. So even after hours of use, the speaker will deliver clean sound and stay cool even at higher volume levels.