QSC Audio CX Series user manual Using Components with Different Voltages

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USING COMPONENTS WITH DIFFERENT VOLTAGES

Sometimes it may be practical to use a transformer or loudspeaker/transformer combination with a different voltage system from what it was originally intended. For example, a 70-volt transformer could be used in a 25- volt system, although you would have to derate the power taps similarly. Never use a transformer with a higher voltage than what it is designed for, though; i.e., you couldn’t use that same transformer on a 100- or 140-volt line.

To properly derate the transformer tap power levels, locate the column with the voltage the transformer is rated for in the table below, then locate the row with the system voltage you want to use it in. The table will indicate the dB reduction to use with the derating chart below it.

EXAMPLE

You have a 70-volt transformer with taps labeled 0.6, 1.2, 2.5, and 5 watts. What power points will those taps provide on a 50-volt line?

The table shows that 50 volts is 3 dB less than 70 volts. The chart confirms that the taps will provide 0.3, 0.6, 1.25, and 2.5 watts, respectively.

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Contents CX Series Table of Contents Explanation of Graphical Symbols Lifting Precautions Rack Mounting PrecautionsSpeaker Damage Speaker Output Shock HazardPortable rack II. Overall DescriptionCX4 IV. Outputs III. InputsInput Sensitivities Caused by a floating inputOutput connections for CX, bridged mono mode Controls & Displays AC PowerVI. Operation CX4 and CX4TCX6, CX6T, CX12 and CX12T TroubleshootingCX6, CX6T, CX12 & CX12T Problem OverheatingPage CX4 and CX4T BRIDGED-MONO Mode CautionAC Current Consumption Maximum LONG-TERM Output PowerHeat Emissions Protection Circuits Frequency Response VII. SpecificationsDamping Factor Output RegulationVoltage Gain Power RequirementsInput SENSITIVITY, Vrms Input ImpedanceWeight DimensionsVIII. Distributed lines Line for different power levelsIX. Designing the Distributed Sound System Loudspeaker Coverage and PlacementPage Intelligibility Determining Power LevelsRequires Example Selecting the AmplifierUsing Components with Different Voltages Watts for the speakers How Many Speakers?25 x 1.25 = Or 64 speakers tapped at 5 watts, etcSpeaker Transformer Saturation XI. Other Design ConsiderationsPower Transfer Coefficient = RLOAD/RWIRE + RLOAD2 Wire LossPage 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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