QSC ISA450 is a ISA Install Professional Power Amplifier  System. And it  designed to meet the needs of sound system designers and contractors worldwide. The ISA Series a rugged, cost-effective power solution for any permanently installed sound system. Frequency Response: 20 Hz-20 kHz, +0/-1 dB Stereo Mode: 260 W for 8Ω, 425 W for 4Ω, 700 W for 2Ω Bridge Mono Mode: 900 W for 8Ω, 1400 W for 4Ω Dimensions (H x W x D): 5.25" (13.3 cm) 3 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep from front mounting rails

QSC ISA500Ti is a ISA Install 2 Channel Professional Power Amplifier. It designed to meet the needs of sound system designers and contractors worldwide. Versatile loading options and a comprehensive set of features make the ISA Series a rugged. And cost-effective power solution for any permanently installed sound system. Frequency Response(-3 dB): 50 Hz, -0.5 dB at 20 kHz Stereo Mode: 260 W for 8Ω, 425 W for 4Ω, 700 W for 2Ω Bridge Mono Mode: 900 W for 8Ω, 1400 W for 4Ω Dimensions (HWD) 5.25" (13.3 cm) 3 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep from front mounting rails

QSC CMX 800Va is a Commercial Power Amplifier. It is an economical and rug power amplifier design to meet the needs of system integrators. QSC CMX 800Va is based upon the proven, rock-solid, reliable performance found in the award winning RMX Series. Frequency Response: 20 Hz – 20 kHz: ±1 dB -3 dB points: 5 Hz – 50 kHz Stereo Mode: 500 W for 8Ω , 800 W for 4Ω, 1200W for 2Ω, 400 W for 70V Direct Drive Bridge Mono Mode: 1500W for 8Ω, 2400W for 4Ω, 2000W maximum in 70V DirectDrive, 2300W maximum in 100V DirectDrive Dimension(H x W x D): 3.5" (8.9 cm) 2 rack spaces x 19" (48.3 cm) rack mounting x 15.9" (40 cm) deep to rear support ears