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 ISA800Ti is a ISA Install 2 Channel Professional Power Amplifier. QSC ISA800Ti 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: 450 W for 8Ω, 650 W for 4Ω, 1200 W for 2Ω Bridge Mono Mode: 1500 W for 8Ω, 2400 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 MP-A40V Series music and paging amplifier family builds on a 50 year legacy of QSC amplifier dependability and quality while offering an incredible amount of flexibility for business music and paging applications. Power (all channels driven) 4 Ω, 8 Ω, 70 V, 100 V: 200 W FlexAmp Technology Allows each pair of amplifier channels to deliver up to 400 W total power, in any ratio Channels: 4 Dimensions (H x W x D): 1.75 " x 19 " x 14.8 "(44 mm x 483 mm x 377 mm)

QSC SPA2-60 Series amplifiers from QSC are four, half-rack RU, convection cooled power amplifiers. These amps can also be bridge to supply up to 200 watts into 4 Ω and 8 Ω, and up to 250 watts into 70 V or 100 V loads. Channels: 2 Stereo Mode: 60 W per channel 8 Ω and 4 Ω Frequency response (4 Ω and 8 Ω): 20 Hz - 20 KHz +/- 0.1 dB Dimensions: 1.7” x 8.7” x 9.5” (43 mm x 220 mm x 241 mm)