QSC RMX2450

About the QSC RMX2450

The QSC RMX2450 is a professional-grade two-channel power amplifier from QSC's renowned RMX series, designed for clean, dynamic power and legendary reliability. It delivers 500 watts per channel at 8 ohms, 750 watts per channel at 4 ohms, and up to 1200 watts at 2 ohms, with bridged mono outputs reaching 1500 watts at 8 ohms and 2400 watts at 4 ohms. The amplifier features a powerful high-current toroidal transformer and ample filter capacitance to ensure generous energy reserves, enabling it to handle high-level transients and demanding 2-ohm speaker loads effortlessly. It uses Surface Mount Technology (SMT) for high component density and direct-mounts output devices to the heat sink for optimal thermal coupling and cooling. The RMX2450 offers ultra-low distortion (<0.03% THD at rated power), a flat frequency response (20 Hz–20 kHz ±1 dB), and a damping factor greater than 300 at 8 ohms. It includes selectable low-frequency filters (30 Hz or 50 Hz), independent user-defeatable clip limiters, and comprehensive protection features such as short circuit, open circuit, thermal, ultrasonic, and RF protection. Connectivity includes active balanced inputs via barrier strip, XLR, and 1/4" TRS, with outputs on touch-proof binding posts and Neutrik Speakon connectors. Controls include front panel AC switch and gain knobs, plus a rear 10-position DIP switch. Indicators for power, signal, and clip are provided per channel. The amplifier is rack-mountable in 2 RU space, weighs approximately 20.2 kg (44.5 lbs), and is cooled by a continuously variable-speed fan with rear-to-front airflow. It is no longer widely available new but remains a reliable workhorse for professional audio applications.