QSC Audio CX Series user manual BRIDGED-MONO Mode Caution, CX4 and CX4T

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BRIDGED-MONO MODE CAUTION:

ALL MODELS—Output voltages as high as 160 volts rms are available be- tween the CX amplifier’s bridged terminals (200 volts at isolated outputs).

CX4T, CX6T and CX12T (140V and 200V opera- tion)—Fully insulated CLASS ONE wiring must be used to connect the amplifier to the loud- speakers

MODE BRIDGÉ MONO: ATTENTION

TOUT LES MODÈLES— Des tensions de sorties aussi élevée que 160 volts rms sont disponible aux bornes du amplificateur CX en mode bridgé mono (200 volts aux sorties isolés).

CX4T, CX6T ET CX12T (opération 140V et

200V)—On doit utiliser du câblage entièrement isolé de CLASSE 1 pour relier l’amplificateur aux haut-parleurs.

VORSICHT BEI MONO- BRÜCKENBETRIEB:

ALLE TYPEN—Zwischen den Ausgangsklemmen der CX-Verstärker können Ausgangs- spannungen bis 160 Volt RMS anliegen (200 Volt bei isolierten Ausgänge).

CX4T, CX6T UND CX12T (140V- u. 200V- Betrieb)—Der Anschluß muß vom Verstärker bis zum Lautsprecher mit vollisoliertem Kabel erfolgen.

PRECAUCIÓN PARA EL MODO MONO PUENTE

TODO LOS MODELOS— Voltajes de salida de hasta 160 VRMS existen entre los terminales de puente del amplificador CX (200 voltios a las salidas aisladas).

CX4T, CX6T Y CX12T (operación 140V y 200V)—Utilice cableado de CLASE UNO totalmente aislado para conectar las altoparlantes.

Instructions for bridged operation

CX4 and CX4T

1.To engage the bridged mono mode, jumper the barrier strip inputs on the rear, in accordance with the diagram printed under the barrier strip inputs. Connect the amplifier input to channel 1 only, with the jumpers as shown to channel 2. Channel 1 and channel 2 gains must be matched. A 4, 8, or 16 ohm speaker load can be connected across the two red speaker terminals, using the red binding post of channel 1 for “+” or “hot.”

CX6, CX6T, CX12 and CX12T

1.Set the switch to the “Bridge” position.

2.Connect the signal to channel 1’s input only. Do not connect an input signal to channel 2. However, as a convenience for routing the same signal to multiple amplifiers without using Y connectors, the mode switch connects the channel 1 and channel 2 inputs in parallel. Therefore, you can use channel 2’s input terminals to pass the audio signal on to other amplifiers.

3.Use only channel 1’s gain control to set the level. Both channels’ “SIGNAL” and “CLIP” indicators should flash identically when the amplifier is operating.

4.Connect the single speaker load across the + amplifier outputs as shown in the Outputs chapter. The positive speaker wire goes to channel 1, and the negative to channel 2.

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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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