QSC SPA4-100

Features
Up to 200 watts per channel into 4 and 8 ohms - the outputs of the SPA4-100 model are designed to provide up to 100 watts per channel into Low-Z loads.
ENERGY STAR qualified amplifier - The ENERGY STAR qualified SPA amplifiers employ an efficient class-D design to conserve energy and reduce operational cost.
Bridgeable outputs for higher power - Bridgeable outputs for higher power - Bridging the outputs of the SPA4-100 will deliver up to 350 watts into 70V or 100V when bridged.
Auto-Ramp provides quiet startup and power-down - The ENERGY STAR auto-ramp circuitry ensures quiet and fast power up from standby and seamless power-down following 25 minutes of inactivity, dramatically reducing power consumption.
Rack-mountable 1U, half rack width enclosure - The SPA amplifers can be mounted in 1 RU, 1/2 rack space, and their clever joining brackets enable easy under-table and wall-mounting