A Look Inside My - QSC, SPA4-60 Amplifier

The SPA Series amplifiers from QSC are four, half-rack RU, convection cooled power amplifiers delivering two or four channels of up to 200 watts per channel into 4 Ω and 8 Ω.
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.
Manual - https://www.qsc.com/resource-files/productresources/amp/spa/q_amp_spa_specs_final.pdf