Following on from QSC’s popular RMX series power amplifiers, the RMXa series two-channel amplifiers are specifically designed to provide high levels of performance in a compact chassis. These Class AB, 2-tier Class H, or 3-tier Class H amplifiers offer multiple, balanced, input connectors to cater for touring, club and fixed-installation applications. Comprehensive amplifier protection circuitry helps prevent damage to the amplifier and speakers.
Linear powered, fan-cooled and 2U rack-mounting, these designs are capable of driving speaker systems of two to eight ohms impedance. Switches on the rear can be set to configure the operation of the amplifier in stereo, parallel and bridge modes, as well as clip-limiting and low-frequency filtering. Low frequency filtering can be set to 30Hz or 50Hz to protect speakers and increase the headroom of the amplifier. The amplifiers provide short-circuit, open-circuit, thermal, ultrasonic and RF protection. Input connectors are wired in parallel, supporting loop-through operation to additional amplifier channels. The Speakon output for channel one is wired on all four pins for single-cable connection to bi-amplified speakers.
The front panel has a power switch, two large cooling-exhaust vents and two gain controls. LED indicators are provided for AC power (blue), signal presence (green) and signal-clip (red) for each channel. A final LED labelled ‘Protect’ illuminates red when the amplifier uses protective muting if a channel is in thermal-mute or if a short circuit on the output occurs.
The rear panel has an IEC socket for AC input power and a resettable circuit breaker. Channel inputs are balanced using barrier strip, latching XLR and 6.35 mm jack connectors. Amplifier operation is determined by mode switches for input configuration. Speaker connections are provided as two Neutrik Speakon connectors and two pairs of ‘touch-proof’ binding-posts. A cooling fan is mounted behind the rear panel.
These 3-tier Class H amplifiers 3U rack-mounting offering additional output power.
Note (1): 20-2000Hz, 0.01% THD. (2):1000Hz, 1% THD. (3): For rated power into 8 ohms. (4): At 1/8 power, 2 ohms, typical.
Input impedance: 20 kohms, balanced; 10kohms, unbalanced. Response: 20-20000Hz, +0dB, -1dB, 10dB below rated power; 5-50000Hz, +0, -3dB, 10dB below rated power. Dynamic headroom: 2dB at 4 ohms. Noise: -100dB, rated power, 8 ohm load, unweighted, 20-20000Hz. Power source: 220-240V AC, 50-60Hz.
Included accessories: IEC AC power cable, manual, 4x rubber feet for non-rackmount installations.
Optional accessories: Rear rack mount kit FG-00031-00.