QSC SPA4-100 Amplifier

The QSC SPA4-100 is a compact, ENERGY STAR®-qualified 4-channel amplifier designed for versatile audio applications in commercial environments. Delivering 100 watts RMS per channel into 4Ω or 8Ω loads, it offers bridgeable outputs that can provide up to 200 watts per channel pair into low-impedance systems and up to 175 watts into 70V or 100V high-impedance systems. The amplifier features an efficient Class-D design with convection cooling, ensuring quiet operation and reduced energy consumption. Its Auto-Ramp circuitry allows for silent power-up and power-down transitions, conserving energy by entering standby mode after periods of inactivity. Housed in a 1U, half-rack width enclosure, the SPA4-100 includes mounting brackets for flexible installation options, such as under-table or wall mounting. With a frequency response of 20 Hz to 20 kHz, a signal-to-noise ratio greater than 100 dB, and comprehensive protection features—including RMS and thermal limiting, as well as safeguards against overcurrent, short circuit, and voltage irregularities—the SPA4-100 is engineered for reliable performance in various professional audio setups.