QSC CX902 is a 2 channel Low-Z Power Amplifier. Exclusive Power Light switch-mode power supply technology for high performance and compact size. QSC CX902 in the Active inrush limiting eliminates AC inrush current, removing the need for expensive power sequencers. XLR and detachable Euro style input connectors. Frequency Response: 20 Hz–20 kHz, ±0.2 dB Stereo Mode: 550 W for 8 Ω, 900 W for 4 Ω, 1500 W for 2Ω, 400 W for 70V / 20 Hz – 20 kHz, 440 W for 70V / 1 kHz, 600 W for 70V / 1 kHz Bridged Mono Mode: 1100 W for 16Ω, 2000 W for 8Ω, 3000 W for 4Ω, 800 W for 140V / 20 Hz – 20 kHz, 880 W for 140V /  1 kHz / 0.05% THD,1200 W for 140V / 1 kHz / 1% THD Dimensions (H x W x D): 3.5" x 19" x 14"(89 mm x 483 mm x 356 mm)

QSC CX1202V is a 2 Channel 70V Professional Power Amplifier. It is design to meet the specialized needs of sound contractors. QSC CX1202V, exclusive QSC Power Light technology with high-output power, versatile loading options, high thermal capacity and unmatched reliability. Frequency Response: 20 Hz - 20 kHz, ± 0.2 dB Stereo Mode: 700 W for 8Ω, 1100 W for 4Ω and 1200 W maximum in 70V Bridge-Mono Mode: 1400 W for 16Ω, 2200 W for 8Ω and 2400 W maximum in 140V Dimensions (H x W x D): 3.5" (8.9 cm) 2 RU x 19" (48.3 cm) rack mounting x 14" (35.6 cm) from front mounting rails

QSC CX204V is a 2 Channel Professional Power Amplifier. And the four channels in only two rack spaces, without compromise on power. Each model is equip with exclusive QSC Power Light switching power supply technology to virtually eliminate noise and hum. Frequency Response 20 Hz - 20 kHz, ± 0.2 dB | 8 Hz - 50 kHz, + 0/-3 dB Stereo Mode: 300 W maximum in 70V Bridge-Mono Mode: 600 W maximum in 140V Dimensions (HWD): 3.5" (8.9 cm) 2 RU x 19" (48.3 cm) rack mounting x 14" (35.6 cm) from front mounting rails