V. Controls & Displays

CX4 AND CX4T

The channel attenuator controls, labeled in dB of attenuation , are located on the rear panel. They have 11 detents, adjustable from 0 dB (full gain) to × (full attenuation). The LED displays for each channel function as shown at right.

CX6, CX6T, CX12, AND CX12T

The channel attenuator controls, labeled in dB of attenuation , are located on the rear panel. They have 11 detents, adjustable from 0 dB (full gain) to × (full attenuation). The LED displays for each channel function as shown at right.

VI. Operation

AC POWER

The amplifier is available for 100, 120, or 220-240 VAC, 50 or 60 Hz operation. Unless it is specially ordered otherwise, each amplifier is configured for the line voltage in the market it is sold in. For example, those sold in Japan are 100 VAC; for North and Central America, 120 VAC; for Europe and most of Asia, 220-240 VAC.

The power cord has a plug for connecting to a standard AC source. For 120-volt operation, the plug is a standard 15-ampere grounded NEMA fitting; it meets safety agency requirements for current consumption of less than 12 amperes during “normal” operation, but peak current draw under heavy usage can be higher.

Models built for 220 to 240-volt use have a standard Schuko (continental Europe) connector on the power cable.

OPERATION

CX4 and CX4T

When first powering up, start with the gain controls off until proper operation is verified (upon turning on the AC switch, the “POWER” LED should come on, and after three seconds, the muting will stop and sound can be heard). The amp should now be working.

Gain should be kept in the upper half of its range for full performance. “POWER” LED indicators are provided to monitor the operation of each channel. Each channel has a red “CLIP” indicator that will show any distortion in the amplifier. The mute circuit should cut the sound off as soon as you turn off the amp, and mute for three seconds before restoring power to the speakers. This blocks turn-on and turn-off thumps.

LED Display for CX4 and CX4T:

LED Display for CX6, CX6T, CX12, and CX12T:

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QSC Audio CX Series user manual Controls & Displays, VI. Operation, CX4 and CX4T, AC Power
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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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