QSC RMX Series s RMX 850 User Manual

QSC RMX Series Amplifiers RMX 850 manual cover

Pages 38

Year 2006

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of 38

QSC RMX Series Amplifiers RMX 850 Specification

The QSC RMX 850 amplifier is a robust and efficient power amplifier designed for professional audio applications, combining high-quality audio performance with affordability and reliability. Featuring a two-rack space design, the RMX 850 delivers up to 300 watts per channel at 8 ohms, 430 watts per channel at 4 ohms, and 830 watts at 8 ohms in bridged mono mode. It incorporates a Class AB amplifier topology, which ensures low distortion and high linearity for superior sound quality. The amplifier is equipped with a comprehensive set of protection features, including thermal overload protection, DC protection, and independently controlled clip limiters to safeguard both the amplifier and connected speakers from damage. The front panel offers an intuitive interface with gain controls, signal and clip LED indicators, and a power switch for straightforward operation. The rear panel is designed with flexibility in mind, featuring balanced XLR and 1/4-inch TRS inputs, along with binding post and Speakon outputs to accommodate various connection requirements. The RMX 850's high-current toroidal transformer and efficient cooling system ensure reliable operation under demanding conditions. Its durable steel chassis provides long-term durability, making it suitable for both touring and fixed installations. Overall, the QSC RMX 850 amplifier delivers a blend of power, performance, and protection features ideal for a range of professional audio environments.

QSC RMX Series Amplifiers RMX 850 F.A.Q.

How do I properly connect my RMX 850 amplifier to a speaker system?

To connect your RMX 850 amplifier to a speaker system, ensure the amplifier is powered off. Use high-quality speaker cables to connect the amplifier's output terminals to the speaker's input terminals. Make sure to match the impedance of the speakers with the amplifier's output for optimal performance.

What is the correct way to bridge an RMX 850 amplifier?

To bridge an RMX 850 amplifier, connect the load across the positive terminals of both output channels. Set the amplifier to bridge mode by following the instructions in the user manual, which typically involves flipping a switch on the back panel. Ensure the total impedance is above the minimum required in bridge mode.

How can I troubleshoot if my RMX 850 amplifier is not powering on?

If the RMX 850 amplifier is not powering on, first check the power cable and ensure it is securely connected. Verify the outlet is functioning by testing it with another device. Check the amplifier's fuse and replace it if necessary. If the problem persists, consult QSC's technical support.

What maintenance is required to keep the RMX 850 amplifier in good condition?

Regular maintenance for the RMX 850 amplifier includes cleaning dust from the vents and fan, checking all connections for corrosion or wear, and periodically testing the amplifier's performance with a reliable audio source. Keep the amplifier in a well-ventilated area to avoid overheating.

Can I use the RMX 850 amplifier for both live sound and studio applications?

Yes, the RMX 850 amplifier is versatile and can be used for both live sound and studio applications. For live sound, ensure adequate ventilation and power supply. In a studio setting, make sure the amplifier's noise levels are acceptable for recording purposes.

How do I adjust the gain settings on my RMX 850 amplifier?

To adjust the gain settings on the RMX 850 amplifier, locate the gain control knobs on the front panel. Turn the knobs clockwise to increase gain or counterclockwise to decrease it. Monitor the output levels to avoid clipping or distortion.

What should I do if the RMX 850 amplifier is overheating?

If the RMX 850 amplifier is overheating, ensure it is placed in a well-ventilated area away from direct sunlight and other heat sources. Check that the cooling fan is operational and the vents are not blocked. Reduce the load or volume levels if necessary to prevent further overheating.

How do I replace a blown fuse in the RMX 850 amplifier?

To replace a blown fuse in the RMX 850 amplifier, first power off and unplug the unit. Locate the fuse holder, usually near the power inlet, and remove the blown fuse. Replace it with a new fuse of the same rating and type. Reconnect the power and test the amplifier.

What are the common causes of distortion in the RMX 850 amplifier output?

Common causes of distortion in the RMX 850 amplifier output include incorrect gain settings, impedance mismatches between the amplifier and speakers, and inadequate power supply. Ensure connections are secure, adjust gain settings appropriately, and match the speaker impedance with the amplifier's output.

How can I set up the RMX 850 amplifier for stereo operation?

To set up the RMX 850 amplifier for stereo operation, connect each channel's output to a separate speaker. Ensure both input signals are connected to the respective channel inputs. Set the amplifier mode to stereo, which is typically the default setting. Adjust the gain controls as needed for balanced output.