QSC Audio CX Series user manual

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The standard input panel installed on the CX Series amplifier has balanced Euro-style detachable header inputs, gain controls, and the Parallel-Stereo-Bridge switch. The panel’s circuit board has solder footprints for passive roll-off circuit components, input isolation transformers, and other special customizations.

The MX-1 Input Expander panel may be installed in the upper panel position. It features XLR inputs and 1/4" RTS inputs. Installation instructions are included with the expansion kit.

Other available accessories include a universal filter and a stereo power limiter; more are in development. Contact QSC for more details before using accessories with CX amplifiers. See the CX Application Notes also.

PARALLEL, STEREO, OR BRIDGED OPERATION (CX6, CX6T, CX12 and CX12T only)

The Parallel-Stereo-Bridge switch is located on the input panel. Always turn off the amplifier before changing the position of this switch.

The most commonly used operating mode for a power amplifier is “Stereo,” in which the two channels are independent and separate all the way from input to output. Set the switch in the center position for stereo operation.

“Parallel” ties the two channel inputs together so that both will be driven by the same signal, without the need for external jumpers or wiring. After the inputs both channels operate independently; though they carry the same signal, their gain controls affect only their respective channels, and they must use separate speakers. Never parallel the speaker outputs!

The “Bridge” position uses both channels to provide about three times the power to a single speaker load that a single channel does. In this position, the switch feeds channel 2 with an inverted signal from channel 1. Thus, when one channel “pushes,” the other “pulls,” providing twice the voltage swing of a single channel.

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Contents CX Series Table of Contents Explanation of Graphical Symbols Rack Mounting Precautions Lifting PrecautionsSpeaker Damage Speaker Output Shock HazardII. Overall Description Portable rackCX4 III. Inputs IV. OutputsInput Sensitivities Caused by a floating inputOutput connections for CX, bridged mono mode AC Power Controls & DisplaysVI. Operation CX4 and CX4TTroubleshooting CX6, CX6T, CX12 and CX12TProblem Overheating CX6, CX6T, CX12 & CX12TPage BRIDGED-MONO Mode Caution CX4 and CX4TMaximum LONG-TERM Output Power AC Current ConsumptionHeat Emissions Protection Circuits VII. Specifications Frequency ResponseDamping Factor Output RegulationPower Requirements Voltage GainInput SENSITIVITY, Vrms Input ImpedanceDimensions WeightLine for different power levels VIII. Distributed linesLoudspeaker Coverage and Placement IX. Designing the Distributed Sound SystemPage Determining Power Levels IntelligibilityRequires Selecting the Amplifier ExampleUsing Components with Different Voltages How Many Speakers? Watts for the speakers25 x 1.25 = Or 64 speakers tapped at 5 watts, etcXI. Other Design Considerations Speaker Transformer SaturationWire Loss Power Transfer Coefficient = RLOAD/RWIRE + RLOAD2Page Heat Emissions XII. Address & Telephone Information

CX Series specifications

QSC Audio, a recognized leader in professional audio solutions, presents the CX Series of amplifiers, a fusion of power, efficiency, and cutting-edge technology designed to meet the demands of various sound reinforcement applications. Known for their reliability and outstanding performance, the CX Series amplifiers are perfect for installations in venues, theaters, and houses of worship, delivering high-quality audio reproduction regardless of the setting.

At the core of the CX Series is its robust Class D amplification. This technology not only ensures excellent audio fidelity but also enhances energy efficiency, resulting in lower operational costs and cooler running temperatures. The amplifiers utilize a linear power supply, which contributes to exceptional audio quality by providing stable and clean power to the components. With varying power ratings, including options ranging from 200 to 1200 watts per channel, the CX Series caters to different venue sizes and specific audio requirements.

The CX Series is engineered with a range of features that enhance usability and performance. Integrated DSP (Digital Signal Processing) allows users to access advanced sound processing algorithms, enabling fine-tuning of audio settings for optimal performance. The amplifiers include comprehensive protection circuitry to safeguard the equipment from thermal overload, short circuits, and signal clipping, ensuring longevity and reliability in demanding environments.

Connectivity is also a significant aspect of the CX Series. The amplifiers are equipped with a variety of input and output options, including XLR, 1/4" TRS, and barrier strip connectors, facilitating seamless integration with a wide range of audio sources and speakers. Moreover, the user-friendly interface includes LCD displays for easy monitoring, making setup and adjustments straightforward for audio engineers and technicians.

Another defining feature of the CX Series is its lightweight design. This portability makes installation and transport easy without compromising on performance. Additionally, QSC’s commitment to sustainability is evident in the design, as the amplifiers are constructed with environmentally friendly materials and have a reduced carbon footprint, aligning with modern practices in eco-conscious audio engineering.

In summary, the QSC Audio CX Series amplifiers blend professionalism with versatility, delivering exceptional performance that satisfies both audio quality and operational reliability. Their innovative technologies and thoughtful design make them a powerful ally for professionals in any sound reinforcement scenario.
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