QSC GX3 Power Amplifier

Overview

Features

• Power levels matched to the most popular speakers used by entertainers
• Optimized for maximum real-world headroom into 4- and 8-ohm speaker systems
• Inputs: XLR, 1/4-inch TRS and phono input connectors for compatibility with any source
• Outputs: Speakon® combo accepts 1/4-inch (TS) plugs or Speakon 2- and 4-pole plugs (connects 2 poles only). Binding posts support all other speaker wiring systems
• Minimum depth chassis (10.1-inch / 257 mm) fits in compact, inexpensive effects racks
• Lightweight - GX3 and GX5 less than 26 lb (12.5 kg). GX7 only 15.5 lb (7 kg)*
• Detented gain controls for precise setting and matching of sensitivity
• GuardRail™ automatically protects the amplifier and loudspeakers from damage due to temperature rise or
• overdrive without shutting down the show
• Front panel LEDs monitor power, signal, and clipping
• Subwoofer/satellite crossover built-in
• 230V 16.5 lb (7.5 kg)

Specifications

• Output power per channel
• 8Ω continous, both channels driven: 300 W
• 4Ω continous, both channels driven: 425 W
• Distortion (1 dB below rated power, 1 kHz): 8 ohms: less than 0.02%, 4 ohms: less than 0.05%
• Signal to Noise (20 Hz - 20 kHz): 100 dB
• Input Sensitivity: 1.2 V rms
• Voltage Gain: 32.2 dB
• Output Circuitry: Class B
• Power Requirements (1/8 power, pink noise at 4 ohms, 120V): 6.3 A
• Frequency Response: 20 Hz–20 kHz, +0, -1 dB
• Dynamic Headroom (4 ohms): 2 dB
• Input Impedance: Greater than 20 kΩ (balanced)
• Maximum Input Level: +24 dBu (16 V rms)
• Input Connectors (each channel): 3-pin XLR and 1/4-inch TRS, balanced, parallel Phono, unbalanced
• Output Connectors (each channel): Speakon®, 1/4-inch, Binding posts
• Amplifier and Load Protection: Short circuit, open circuit, thermal, RF protection, Load protected against DC faults
• Front Panel Controls and Indicators
• Gain controls, 21 detents
• Red CLIP LEDs, proportional, 0.1% THD threshold
• Green SIGNAL LEDs, threshold 35 dB below clipping
• Blue POWER LED, AC on
• Rear Panel Controls
• Full Range / Crossover switch
• 100 Hz, 3rd order LP (sub), 2nd order HP (top)
• Product Dimensions (H×W×D): 89 × 483 × 257 mm, 3.5 × 19 × 10.1 in
• Carton Dimensions (H×W×D): 610 × 380 × 153 mm, 24 × 15 × 6 in
• Net Weight: 12.1 kg / 27 lb
• Agency Approvals: UL, CE, RoHS/WEEE Compliant
• AC Current and Heating, 120 VAC (multiply current by 0.5 for 230 VAC): GX3
• 1/8 power represents typical maximum operating conditions
• 1/3 power represents over-driven program levels
• Full power is breaker limited to short periods
• For 230 V, multiply AC current by 0.5
• For 100 V, multiply AC current by 1.25