Crest Audio X 18R, X 20R owner manual Left, Right and Mono Bus Inputs, Group 1, 2, 3 & 4 Bus Inputs

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Master Section 3

Rear Panel Features

Left, Right and Mono Bus Inputs

These three female XLRs are used to bring external signals directly into the Left, Right and Mono mix buses. Useful for linking multiple mixers together or to introduce addi- tional signals into the main mix.

Balanced in, Nominal level is +4 dBu

Group 1, 2, 3 & 4 Bus Inputs

These four 1/4” TRS jacks are used to bring external signals directly into the Group mix buses. Useful for linking multiple mixers together.

Balanced in, Nominal level is +4 dBu

Insert For Left, Right and Mono

This switching 1/4” TRS jack allows an external processor to be inserted into the signal path of the Main outputs.The tip carries the SEND signal from the mixer, and the ring carries the RETURN signal back to the mixer.The insert-send point is located directly after the Main mix bus, the return comes back at the top of the Master fader.

Tip is Send, Ring is Return, Sleeve is Audio Ground. Send (output) impedance is 100 unbalanced Return (input) impedance is 5K￿ unbalanced Nominal Operating Level= -2 dBu

NOTE: To avoid any degradation of the mixer's output signal, any processing gear patched into any insert point should have a low impedance output (<100￿ ) and must be capable of cleanly driving a 2K￿ load to +21 dBu.

Left, Right And Mono Main Outputs

The Left, Right and Mono outputs appear at these male XLRs.The output level is swit- chable between line level and mic level.

Line/Mic Switches For Left, Right And Mono Main Outputs These switches are recessed to prevent accidental changes.

Output levels are provided at line level for feeding the inputs of a signal processor, another mixer or a power amplifier.

Nominal Level= +4 dBu, 100 Balanced

Output levels are reduced to mic level for feeding the Microphone inputs on a signal processor or another mixer. Outputs are protected against phantom power.

Nominal Level= -25 dBu, 200￿ Balanced

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Contents 18R / X 20R Page Important Precautions Page Important Safety Instructions Wichtige Sicherheitshinweise Instructions Importantes De Securite Instrucciones Importantes Para Su Seguridad Table Of Contents 18R/20R Block Diagram How To Use This Manual Mono Input Channel Hz Lo-Cut Filter Lo Cut SwitchLine Input Mic Pad GainMono Input Channel Low Frequency-LF High Frequency-HFHigh Mid-HM Low Mid-LMModule Block Diagram Controls AUX 3-4 PRE Aux 1 2 PREAux Sends 1 Aux Sends 3, 4, 5Mono Input Channel PFL MuteRear Panel Chan Insert Jack 48V Phantom PowerLine Input Jack XLR Mic Input JackStereo Input Channel SUM Inputs Str Line In Mic PadModule Low Frequency-LM Front Panel Features Stereo EQStereo Input Channel AUX 5 and AUX 6 are post-fader AUX 5 and AUX 6 are pre-fader Stereo Input Channel Input Fader BAL ControlRear Panel Block Diagram +48V On Master Section Tape Solo OFFFrom Monitor Master Section PWR LED Solo LEDMaster Section Aux 3, 4, 5, & 6 AFL AUX OUT 1-2 Level ControlAux 1-2 AFL AUX OUT 3, 4, 5 & 6 Level ControlMaster section Left Assignments For Groups 1, 2, 3 GroupPK / SIG LED IndicatorsGROUPAssignment Section Mono assignments for Groups 1, 2, 3Block Diagram Controls SUM Mono Monitor Output SectionMonitor Level Control Module Block Diagram Controls Mono Source SelectMaster Section MONO, Left & Right Master faders 100mm Mono PK/SIG LEDLeft/Right PK/SIG LED Mono AFLMaster Section Left, Right And Mono Main Outputs Left, Right and Mono Bus InputsGroup 1, 2, 3 & 4 Bus Inputs Insert For Left, Right and MonoRear Panel Block Diagram Group Inserts 1Thru Aux Insert 1ThruAux Outtrs Jacks 1Thru Aux OUT XLRs 1ThruMaster Section Solo Link Tape LineAlt Out Monitor OutSpecifications 18R/20R Internal Options Connector Pinout DetailUser Notes User Notes Crest P/N