QSC Audio Complete Guide to Outputs and Connections for QSC CX168 Stereo Amplifier
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CONNECTIONS: OUTPUTS

Outputs

Refer to the label on the rear panel of the amplifier for proper wiring connections. The output connection for STEREO and PARALLEL modes is on the left side of the label , while the output connection for BRIDGE mode is shown to the right side of the label. Note: Polarity changes from channel to channel and is different for bridge mode. Be certain of polarity of connec- tions before applying power. Reversed polarity may degrade audio frequency response.

Speaker connection diagrams and “MODE” switch settings are printed on a rear panel label, as shown, above.

Stereo and Parallel Mode

In stereo or parallel mode, each speaker is connected to its own individual channel of the amplifier. This connection method is shown on the left side of the connection diagram (rear panel) or in the diagram, right.

Use 4 ohm minimum impedance in stereo or parallel mode. Ensure the mode configuration switches are set for stereo or parallel mode when connecting speakers to each channel’s output.

Bridge Mode

In bridge mode, each speaker is connected to a bridged-pair of outputs. The channels must first be “bridged” by setting the mode configuration switches to the bridge settings. Then con- nect the speakers as shown on the right side of the connection diagram (rear panel) or in the diagram, right.

Use 8 ohm minimum impedance in bridged mode. Ensure the mode configuration switches are set for bridge mode when connecting speakers to bridged output pairs .

BRIDGE MODE PRECAUTIONS:

Do not use 2 ohm or 4 ohm loads in bridge mode! 8 ohms is the minimum impedance for bridge mode operation. This mode puts a high demand on the

amplifier and speaker. Excessive clipping may cause protective muting or speaker damage. Ensure the speaker has a sufficient power rating.

Stereo or parallel connection- single speaker shown con- nected to amplifier channel 6 output. Ensure that all speaker connections maintain proper polarity ( + to +, - to - ).

Bridge connection- single speaker shown connected to am- plifier channels 5 and 6 (bridged with mode switch settings). Ensure that all speaker connections maintain proper polar- ity ( + to +, - to - ).

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Contents CX168 Important Safety Precautions Explanation of Symbols FCC Interference StatementTable of Contents Introduction Front Panel Front Panel with Security PlateRear Panel Dimensions Mounting Points Rack Mounting Installation Unpacking & Rack MountingWhat is Included Supporting the Rear of the AmplifierAC Mains Connection Installation Cooling & AC Mains RequirementsFan Cooling Setup Setting the Mode Configuration DIP Switches SetupSetup Setting the Mode STEREO, PARALLEL, or Bridge ModesLow Frequency Filter Setup Mode Switches Clip Limiter and LOW Frequency FiltersClip Limiter Low Frequency Filtering Tips Frequency Response CurvesConnections INPUTS- Using the Terminal Block Inputs Connections INPUTS- Using the DataPorts Connections Outputs Stereo and Parallel ModeBridge Mode OutputsConnections OUTPUTS- Using the Terminal Block Connectors Terminal Block ConnectionsOperation Power Switch and Gain Controls Power SwitchOperation LED Indicators LED IndicatorsOperation Gain Controls Gain ControlsOperation Gain Control Security Plate Gain Control Security PlateUsing the DataPort Operation Using the QSC Dataport ConnectionsDataPort Connectors General Guidelines to using the DataPorts on the CX168 What Can I Connect to the DataPort?Applications Typical Application Examples Four Room Stereo FeedOFF Appendix Description of Stereo & Parallel Operating Modes Stereo ModeParallel Mode Appendix Description of Bridge Operating Mode Normal Operating LevelsAppendix Multiple Speaker Loads in Series Multiple Lo-Z Loads in SeriesAppendix Multiple Speaker Loads in Parallel Multiple Lo-Z Loads in ParallelTroubleshooting no Sound Problem no SoundProblem Hiss SPECIFICATIONSCX168 Output Power in wattsSpecifications CX168Disclaimer Warranty Information & HOW to Contact QSCProduct Warranty Page Page
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