QSC 8 ohm capable) User Manual

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Contents

QSC 8 ohm capable) User Manual Manual pdf 7 page image

EN770V stereo or parallelconnection- Each 70Vzone connects to itsrespective channel.Ensure that all speakerconnections maintainproper polarity.140V Bridge connection-Wire each bridged pair toa 140V circuit as shown.Check for proper polarity.OutputsWiring connections are shown on the back of the chassis. Carefully note thepolarity marks, which are arranged to make Bridge Mode connections easier.Four-channel models are shown in the examples; two-channel models are similar.OUTPUT TERMINAL SAFETY WARNING! Do not touch output termi-nals while amplifier power is on. Make all connections with ampli-fier turned off. Risk of hazardous energy!Low Impedance OutputsStereo and Parallel Mode- Connect each loudspeaker to its own channel ofthe amplifier, as shown on the chassis label. The mode configuration switchesmust be set for Stereo or Parallel mode.Bridge Mode- Bridge mode configures the channel pair to drive a single high-power loudspeaker load. The mode configuration switches must be set for Bridgemode. Use only the first channel's input and Gain control. Set the second chan-nel's Gain control at minimum.Distributed Outputs (“V” models, 70V/140V)Stereo and Parallel Mode- Connect each 70V circuit to its own channel of theamplifier, as shown on the chassis label. The mode configuration switches mustbe set for Stereo or Parallel mode.70V Output- Risk of hazardous energy! Class 2 wiring shall be usedfor 70V outputs.Bridge Mode- Bridge mode configures the channel pair to drive a single 140Vaudio circuit. The mode configuration switches must be set for Bridge mode. Useonly the first channel's input and Gain control. Set the second channel's Gaincontrol at minimum. Connect the load as shown on the chassis label.140V BRIDGE MODE PRECAUTIONS:Class 3 Wiring shall be used for bridged mono 140V outputs.Connect only 140V distributed audio circuits in bridged mode. Do notuse 70V loads in bridge mode! Use Stereo or Parallel mode channelsto drive 70V loads. 140V is the minimum for bridge mode operation.Low Impedance Stereo orParallel Connection- Eachloudspeaker load con-nects to its respectivechannel. Four channelmodel shown. Ensure thatall speaker connectionsmaintain proper polarity.Low Impedance BridgeConnection- Each loud-speaker load connects to abridged channel pair. Four-channel model shown.Check for proper polarity.Loads Rated by ModelBe sure the modelamplifier you are usingis rated for the load!An asterisk (*)indicates themodel is rated for the load.(S/P)= Stereo/Parallel mode(Br.)= Bridge mode