The 850 Power Amp by QSC USA

The QSC USA 850 Power Amplifier is a rugged, professional-grade stereo power amp designed for live sound reinforcement and fixed installations. Built as part of QSC’s USA series, it delivers clean, reliable power with low distortion and strong signal clarity. Its Class AB design ensures consistent audio performance, while comprehensive protection circuits safeguard both the amplifier and connected speakers. Known for its durability and high current capability, it can handle demanding loads down to low impedances. With flexible connectivity and bridge-mono operation, it remains a dependable choice for musicians and sound engineers.

Specs:

• Power output: approx. 240–255 W per channel @ 8Ω (stereo)
• Power output: approx. 425 W per channel @ 4Ω
• Bridge mode: up to ~850 W @ 8Ω
• Frequency response: 20 Hz – 20 kHz
• Total harmonic distortion: ~0.1%
• Damping factor: >200
• Signal-to-noise ratio: ~100 dB
• Input sensitivity: 1.16 V
• Minimum load impedance: 2Ω
• Gain: 32 dB
• Cooling: Dual-speed fan, rear-to-front airflow
• Protection: Short circuit, thermal, DC fault, RF protection
• Connections: XLR / 1/4" TRS inputs, binding post outputs
• Form factor: 19" rackmount (approx. 3U)
• Weight: ~15.4 kg