QSC RMX4050a – 2-Channel 2000W Professional Power Amplifier

Product Overview

The QSC RMX4050a is a two-channel professional low-Z power amplifier built for high-power live sound reinforcement. Rated at 850 watts per channel into 8 ohms, 1,400 watts into 4 ohms, 2,000 watts into 2 ohms, and 2,800 watts bridged into 8 ohms, it occupies a 3RU chassis less than 16 inches deep. A three-tier Class-H output stage and dual-mono high-current power supply give it the efficiency and reliability needed for demanding touring and installed systems.

Product Description

The RMX4050a's three-tier Class-H circuit manages rail voltages in stages so less AC current is wasted and more is converted to output, improving thermal performance for continuous 2-ohm stereo or 4-ohm bridged operation. High-current toroidal transformers support strong 2-ohm power with low noise, while independent user-defeatable clip limiters and selectable 30/50 Hz low-frequency filters tailor the amplifier to the application. Inputs accept balanced 1/4-inch TRS, XLR, and barrier strip; outputs use touch-proof binding posts and Neutrik Speakon. Front gain controls, signal/clip LEDs, and per-channel DC and thermal protection complete the package. For maximum output, compare the QSC RMX5050a.

Key Features

• 850 W (8Ω), 1,400 W (4Ω), 2,000 W (2Ω) per channel — 2,800 W bridged into 8Ω for high-power systems.
• Three-tier Class-H output stage — Efficient power delivery and improved thermal performance.
• Dual-mono high-current power supply — Increased reliability and performance.
• High-current toroidal transformers — Strong 2-ohm power with low noise.
• User-defeatable clip limiters and 30/50 Hz filters — Reduce distortion and protect loudspeakers.
• 1/4-inch TRS, XLR, and barrier-strip inputs — Touch-proof binding-post and Neutrik Speakon outputs.
• Compact 3RU chassis under 16 inches deep — Operates on a standard 15 A (120 V) circuit.

Typical Applications

• House of worship
• Multi-purpose room
• Auditorium

Technical Specifications

Frequently Asked Questions

What loads does the RMX4050a support? It is rated for 8-, 4-, and 2-ohm operation (850 / 1,400 / 2,000 W per channel) and 2,800 W bridged into 8 ohms.

Does it run on a standard wall circuit? Yes — the 2,000-watt-per-channel RMX4050a operates on a standard 15-amp, 120 V circuit.

What input and output connectors are provided? Balanced 1/4-inch TRS, XLR, and barrier-strip inputs; touch-proof binding-post and Neutrik Speakon outputs.

What about warranty and support? Coverage follows QSC's published warranty terms. Contact Creation Networks support for assistance.