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QSC RMX1450a Two-Channel Power Amplifier with Neutrik Speakon® Output

500W per channel, compact size, high-current toroidal transformers

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What's in the box:

  • QSC RMX1450a
  • Power Cord
  • Limited Three-Year Warranty Extendable by Additional 3-Year Service Contract

Video:

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Item Number 
QSC-RMX1450A
Vendor Part

The 500 watts per channel 4Ω QSC RMX1450a Low-Z Power Amplifier is a 2RU rack mountable amplifier designed for live sound reinforcement applications. The amplifier features two Class AB output channels that can operate in either stereo or mono bridge mode. The unit operates on a standard 15 amp plug and utilizes high-current toroidal transformers for less noise and better performance when pushing a 2 ohm load. The front panel of the unit features two gain control knobs for easy access and each channel is protected by a dedicated DC and thermal overload protection circuit. For inputs, the back of the unit accepts both balanced 1/4" and XLR inputs. For outputs, the unit features both Neutrik Speakon and touch-proof binding post connections.

Features:

  • Compact size - up to 2500 watts in two rack spaces, or 5000 watts in three rack spaces
  • High-current toroidal transformers, for greater 2-ohm power and low noise
  • Independent user-defeatable clip limiters reduce distortion
  • Selectable low-frequency filters (30 Hz or 50 Hz) protect speakers and increase headroom
  • The 4000-watt RMX4050a operates on a standard 15 amp plug (120V)
  • Both the RMX4050a and the RMX5050a feature a dual mono, high-current power supply for increased reliability and performance
  • The RMX4050a's particularly exceptional combination of cooling capacity and electrical efficiency provides robust thermal performance suitable for high continuous power in 2-ohm stereo or 4-ohm bridged applications
  • Balanced 1/4-inch (6.3 mm) TRS, XLR, and barrier strip inputs
  • Touch-proof binding post and Neutrik Speakon® outputs
  • Front mounted gain controls for easy access
  • Signal and clip LED indicators for monitoring performance
  • Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers
  • 3-year warranty plus optional 3-year extended service contract

Be sure to check out the brochure and video for more information!

Specifications for the QSC RMX1450a Two-Channel Power Amplifier

{ "Stereo Mode (both channels driven)" : { "8Ohms / FTC 20 Hz - 20 kHz / 0.1% THD" : " 260 W ", "8Ohms / EIA 1 kHz / 0.1% THD" : " 300 W ", "4Ohms / FTC 20 Hz - 20 kHz / 0.1% THD" : " 400 W ", "4Ohms / EIA 1 kHz / 0.1% THD" : " 500 W (0.5% THD)", "2Ohms / EIA 1 kHz / 1% THD" : " 700 W" }, "Bridge Mono Mode" : { "8Ohms / FTC 20 Hz - 20 kHz / 0.1% THD" : " 800 W ", "8Ohms / EIA 1 kHz / 0.1% THD" : " 900 W", "4Ohms / EIA 1 kHz / 1% THD" : " 1400 W" }, "Signal to Noise (20 Hz - 20 kHz)" : "> -100 dB", "Distortion (SMPTE-IM)" : "< 0.01%", "Input Sensitivity at 8Ohms" : "1.15V (+3.4 dBu)", "Voltage Gain" : "40x (32 dB)", "Output Circuitry" : "Class AB", "Power Requirements" : { "Typical, 1/8 power pink noise at 4Ohms" : " 6.0 A ", "Severe, 1/3 power pink noise at 4Ohms" : " 9.6 A ", "100, 120, 230 VAC, 50 - 60 Hz (factory configured)" : "" }, "Supplied Plug Type, 100/120V" : "NEMA 5-15", "Supplied Plug Type, 230V" : "CEE7/7", "Distortion (typical)" : { "20 Hz - 20 kHz: 10 dB below rated power" : " < 0.03% THD / 4Ohms and 8Ohms ", "1.0 kHz and below: full rated power" : " < 0.03% THD / 4Ohms and 8Ohms" }, "Frequency Response" : "20 Hz - 20 kHz: +0/-1 dB -3 dB points: 5 Hz and 50 kHz (LF filter bybassed / 8Ohms)", "Damping Factor (1 kHz and below)" : "> 300 at 8Ohms", "Input Impedance" : "10k Ohms unbalanced / 20k Ohms balanced", "Input Clipping" : "10 Vrms (+22 dBu)", "Cooling" : "Continuously variable speed fan, back-to-front air flow", "Connectors (each channel)" : { "Input" : " Active balanced / 3-pin Euro-style detachable terminal block and XLR (pin 2+) ", "Output" : " Touch-proof binding posts / Neutrik Speakon" }, "Controls" : { "Front" : " AC switch / Ch. 1 & 2 gain knobs ", "Rear" : " 10-position DIP switch" }, "Indicators" : { "Power-on" : " Green LED ", "Signal" : " Yellow LED (1 per channel) ", "Clip" : " Red LED (1 per channel) ", "Protect" : " Red LED" }, "Amplifier Protection" : "Full short circuit, open circuit, thermal, ultrasonic, RF protection. Stable into reactive or mismatched loads", "Load Protection" : "Turn-on/off muting / AC coupling (850, 1450) / Triac crowbar (1850HD, 2450, 4050HD, 5050) on each channel", "Dimensions" : "3.5" / 88.90mm tall / 2 rack spaces", "Weight" : "40lbs / 18.14kg" }

Understanding Sound Reinforcement - Power Amplifiers (Part 2)

Understanding Sound Reinforcement - Power Amplifiers (Part 1)

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