Gain Controls

The Gain controls are recessed and can be adjusted with a small screwdriver or flat tool. If desired, the Gain Con- trol Security Cover can be installed to prevent changes to the installer's settings.

Turn the gain controls clockwise to increase gain and counter clockwise to decrease gain. The maximum volt- age gain of the amplifier varies depending on the model designation. Maximum voltage gain for each model is shown on the front panel label in parentheses adjacent the 0dB attenuation setting.

The Gain controls are marked in dB of attenuation. There are 21 detents for repeatable adjustments. The upper 14 steps are about 1 dB each, and settings should normally be made within this range. The range below -14 dB should not be used for normal program levels, as the input headroom could be exceeded, but can be used for testing at reduced levels. At the minimum setting, the signal is completely cut off.

Gain Control Security Plate

The cover blocks access to the Gain settings. The LED indicators are still visible to monitor the system's opera- tion.

1.Use a 9/64" or 3.5 mm hex driver to loosen the screw several turns. Do not remove it completely.

2.Slide the right end of the cover under the loosened screw.

3.Insert the left end tabs into the last row of ventilation slots, and slide the panel fully to the right. It should lock into the slots.

4.Confirm that the LED's are visible through the cover. Tighten the hex screw carefully.

CX902 shown with gain control security plate installed.

Gain controls on 2-channel models. Markings will vary depending on model.

Gain controls on 4-channel models. Markings will vary depending on model.

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QSC Audio CX254, CX602V, CX404, CX902, CX702, CX204V, CX1102, CX1202V, CX302V, CX502 Gain Controls, Gain Control Security Plate
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CX302, CX1202V, CX502, CX702, CX1102 specifications

QSC Audio has established itself as a leader in professional audio solutions, and their CX series amplifiers, including the CX204V, CX254, and CX404, stand out for their performance and versatility. These amplifiers are specifically designed to meet the needs of commercial audio applications, such as in venues, corporate environments, and educational institutions.

The CX204V is a 2-channel amplifier that delivers 200 watts per channel at 4 ohms, making it ideal for smaller venues or installations that require high-quality audio without overwhelming power. One of its key features is the inclusion of built-in DSP (Digital Signal Processing) capabilities, allowing users to optimize their sound with advanced filtering and equalization options. Additionally, the amplifier supports a range of input options, including balanced XLR and 1/4-inch connectors, providing flexibility for various audio setups.

Moving to the CX254, this 2-channel amplifier boosts power output to 250 watts per channel at 4 ohms, making it suitable for larger spaces that necessitate a bit more oomph. The CX254 also includes QSC’s Power Factor Correction technology, which ensures efficient power usage and greater amplification performance, even during demanding situations. Furthermore, it features RS-232 control capabilities, providing users with remote operation options and making integration into existing audio systems seamless.

The CX404 takes things a step further with its 4-channel configuration, delivering 200 watts per channel at 4 ohms. This amplifier is particularly well-suited for multi-zone applications where audio needs to be distributed across various areas. With its advanced overheating protection and short-circuit protection features, the CX404 is built for durability and reliability, ensuring consistent performance without the risk of damage during extended use.

All three amplifiers in the CX series include QSC's innovative Class D topology, offering lightweight and compact design without sacrificing power or audio quality. The CX series is also distinguished by its robust construction, including a rugged chassis designed to withstand the rigors of installation and performance use.

In summary, the QSC Audio CX204V, CX254, and CX404 seamlessly combine power, efficiency, and versatility, making them ideal choices for a variety of commercial audio applications. Their built-in technologies, advanced features, and solid construction emphasize QSC’s commitment to delivering exceptional sound experiences.
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