QSC Audio CX168 user manual Applications Typical Application Examples, Four Room Stereo Feed

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APPLICATIONS: TYPICAL APPLICATION EXAMPLES

Four Room Stereo Feed

A simple application of the CX168 would be an installation with 4 rooms of coverage; each room to be provided with a stereo audio feed. All speakers are 4 ohm or greater impedance and have a frequency response rated down to 45 Hz., making them suitable for the 70 Hz. low frequency setting. Clip limiting will be used with these full-range speakers. Operating mode of all four channel pairs will be set to ‘stereo’ because the audio inputs are stereo and a stereo result is desired in each room.

Input connections can vary too much to provide meaningful examples. For this example, assume that each input has its own discrete signal provided at the terminal block input connectors.

Routing would make sense if kept in room number order:

Room #1:

Fed by channel pair #1 (Ch.1&2)

Room #2:

Fed by channel pair #2 (Ch.3&4)

Room #3:

Fed by channel pair #3 (Ch.5&6)

Room #4:

Fed by channel pair #4 (Ch.7&8)

MODE switch configuration:

 

Ch.1/ Ch.2 mode switch:

Clip Limiters ON

 

Low Frequency Filter ON

 

Low Frequency Setting 70 Hz.

 

Mode: stereo

Ch.3/Ch.4 mode switch: Ch.5/Ch.6 mode switch: Ch.7/Ch.8 mode switch:

same as first mode switch same as first mode switch same as first mode switch

Tri-Amp’d Stereo Cabinets with Subwoofer Driven by Bridged Channel Pair (next page)

Two discrete 3-way (tri-amp) cabinets are to be connected to the CX168 along with an 8 ohm subwoofer cabinet.

The subwoofer will require the most amount of power and therefore will be driven by two channels bridged into one. Its impedance meets the minimum requirement for bridged output. All other drivers are 4 ohms or greater and meet the single channel minimum impedance requirement. Each of the tri-amp cabinets will be driven with three discrete channels (totaling 6 channels). The total required channel count is 8; the CX168 is the perfect tool for the job.

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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 AmplifierFan Cooling Installation Cooling & AC Mains RequirementsAC Mains Connection Setup Setting the Mode Configuration DIP Switches SetupSetup Setting the Mode STEREO, PARALLEL, or Bridge ModesClip Limiter Setup Mode Switches Clip Limiter and LOW Frequency FiltersLow Frequency Filter 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 PlateDataPort Connectors Operation Using the QSC Dataport ConnectionsUsing the DataPort General Guidelines to using the DataPorts on the CX168 What Can I Connect to the DataPort?Applications Typical Application Examples Four Room Stereo FeedOFF Parallel Mode Stereo ModeAppendix Description of Stereo & Parallel Operating Modes 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 CX168Product Warranty Warranty Information & HOW to Contact QSCDisclaimer Page Page
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