American Musical Supply
American Musical Supply
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QSC PLX1804 Lightweight Power Amplifier

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Product Description

Capable of up to 1,800 watts of power while weighing a mere 13 pounds, the QSC PLX1804 is an impressive power amp!
The compact 04 models (PLX1104, PLX1804) bring performance and technology, plus even greater value, to applications that don't require bridged or 2 ohm operation. Designed to power one or two speakers from each amplifier channel (4 ohm minimum loading), these models offer a simplified feature set while retaining genuine, uncompromised PLX performance and technology. Weighing just 13 pounds (5.9 kg) these plug-and-play amplifiers are perfect for ultra-portable rigs, as well as reference-quality playback.

Purchase a PLX Series Amplifier from AMS and Recieve QSC's
QSC 6 Year Extended Warranty
after registering your product at

QSC PLX4 Series Features:
  • Very light weight (13 pounds/5.9 kg)
  • Cooling design exhausts hot air out the front, keeping the rack cool. Flow-through heat sinks require no filters that could become clogged
  • Front panel LED power, clip, -10 dB, and signal present indicators for system monitoring and troubleshooting.
  • Speakon NL-4 output connectors provide a positive-locking speaker connection. Ch 1 output uses all 4 wires for single-cable connection to bi-amplified speakers
  • 21-position front-panel gain controls for precise, repeatable amplifier adjustment
  • Balanced XLR inputs with parallel TRS connectors accommodate all common input connectors and support loop-through operation
  • Patented PowerLight power supply technology with other patents pending
  • Value combined with uncompromised PLX technology, quality and performance for applications that don't require bridged or 2 ohm stereo operation
  • Two models with power ratings up to 900 watts per channel @ 4 ohms
  • Clip limiting protects speakers; thermal limiting maintains operation even during abnormal overloads

Product Specifications
QSC PLX1804 Power Amplifier Specifications
    Stereo Mode (both channels driven)*
  • 8 Ohms FTC 20 Hz - 20 kHz 0.05% THD: 550 watts
  • 8 Ohms EIA 1 kHz 0.1% THD: 600 watts
  • 4 Ohms FTC 20 Hz - 20 kHz 0.05% THD: 800 watts
  • 4 Ohms EIA 1 kHz 0.1% THD: 900 watts
  • Signal to Noise (20 Hz - 20 kHz): > -106 dB
  • Input Sensitivity at 8 Ohms: 1.20 Vrms
  • Voltage Gain at 8 Ohms: 35 dB
  • Output Circuitry: 2-Step Class H
  • Power Requirements (1/8 power, pink noise at 4 Ohms): 9.4A/120V
  • Distortion (SMPTE-IM): < 0.02%
  • Distortion (typical):
    • 1/8 Rated Power, 20 Hz - 20 kHz: < 0.02%
    • Full Rated Power, 20 Hz - 20 kHz: < 0.02%
  • Damping Factor: > 200
  • Input Impedance: 10k ohms unbalanced / 20k ohms balanced
  • Input Clipping: 5.5 Vrms (+15 dBu)
  • Cooling: Variable-speed fan, rear-to-front air flow
  • Input Connectors, each channel: 3-pin XLR and 1/4 inch TRS balanced, parallel
  • Output Connectors, each channel: Neutrik NL4 Speakon - Both channels available on Ch 1 NL4 connector
  • Amplifier Protection: Full short circuit, open circuit, thermal, infrasonic, ultrasonic, and RF protection. Stable into reactive or mismatched loads
  • Load Protection: On/Off muting, DC-fault power supply shutdown
  • Dimensions:
    • Height: 3.5 inches (8.9 cm) - 2 rack units
    • Width: 19 inches (48.3 cm)
    • Depth: Rack mounting surface to rear: 8.95 inches (22.7 cm)
      - Overall 11 inches (27.9 cm)
  • Weight: 13 lbs (5.9 kg)
  • Agency Approvals: CCC, CB, CE, FCC, KETI, cUL, UL

Helpful Info about the Manufacturer
Phone:  800-772-2834 Warranty:  3 Years on New Amps; B-Stock is 1 (one) Year only!
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