Crest Audio X 18R, X 20R owner manual Connector Pinout Detail, 18R/20R Internal Options

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Specifications 4

 

Specifications

Frequency Response

+0/-1 dB 20Hz-20kHz ref 1 kHz

 

(any input to any output)

THD

any output < 0.01% THD 20 Hz - 20kHz@ +15 dBu out

Noise

mic ein: better than –128 dBu 20Hz to 20kHz 150 Ohm source, 60 dB gain

 

Bus Noise: better than -85 dBu

Crosstalk

channel mute > 90 dB, channel routing > 80 dB

 

channel fader attenuation > 90dB

 

aux send attenuation > 85 dB

Phase Shift

< +/- 30 degrees, 20Hz to 20kHz – mic-in to main out

Mic-in

XLR 4k Ohm balanced

 

max voltage gain to main outs = 100 dB

Line-in XLR and TRS

> 10k Ohms balanced

RCA Tape Input

> 10k Ohms unbalanced

Bus Inputs

> 10k Ohms balanced

L/R/M Outputs

XLR 100 Ohms balanced

 

(switchable between line or mic level)

Group/Direct Out

TRS 50 Ohms ground compensated

Aux Outputs

XLR & TRS 50 Ohms ground compensated

Headphones

Stereo, intended to drive > 8 Ohms

Dimensions

17.5" height (10u) x 19" width x 4.5" depth behind panel

Weight

30 lbs.

Internal Power Supply

100 - 240 VAC, 50/60Hz

Warranty

Five Years

Connector Pinout Detail

The rear panel of the X 18R/20R is screened with the pinout and electrical details of the I/O connectors. It is reprinted here for your reference.

X 18R/20R Internal Options

The Input Channels have various options that can be selected. If specified at time of order, the factory will set-up the X-Series with the user’s desired settings. If configured from the factory, the appropriate check-box will be marked, showing which option was changed, and what it was changed to.

Aux PRE: This PRE source (within the channel) is normally Pre-fader. It can be changed to Pre-Insert or Pre-EQ and would apply to all PRE switches within that channel.

PRE-Follow Mute: Normally, the PRE signal (no matter what the source) will be muted when the main channel is muted (MUTE sw depressed).An option allows the PRE source to ignore the channel mute and be active (ON) at all times.

Channel Direct Out: This output is normally Post-fader. It can be changed to Pre-Fader on a channel-by- channel basis.

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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 Line Input Mic Pad Lo Cut SwitchGain Hz Lo-Cut FilterMono Input Channel High Mid-HM High Frequency-HFLow Mid-LM Low Frequency-LFModule Block Diagram Controls Aux Sends 1 Aux 1 2 PREAux Sends 3, 4, 5 AUX 3-4 PREMono Input Channel PFL MuteRear Panel Line Input Jack 48V Phantom PowerXLR Mic Input Jack Chan Insert 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 1-2 AFL AUX OUT 1-2 Level ControlAUX OUT 3, 4, 5 & 6 Level Control Aux 3, 4, 5, & 6 AFLMaster section GROUPAssignment Section GroupPK / SIG LED IndicatorsMono assignments for Groups 1, 2, 3 Left Assignments For Groups 1, 2, 3Block Diagram Controls SUM Mono Monitor Output SectionMonitor Level Control Module Block Diagram Controls Mono Source SelectMaster Section Left/Right PK/SIG LED Mono PK/SIG LEDMono AFL MONO, Left & Right Master faders 100mmMaster Section Group 1, 2, 3 & 4 Bus Inputs Left, Right and Mono Bus InputsInsert For Left, Right and Mono Left, Right And Mono Main OutputsRear Panel Block Diagram Aux Outtrs Jacks 1Thru Aux Insert 1ThruAux OUT XLRs 1Thru Group Inserts 1ThruMaster Section Alt Out Tape LineMonitor Out Solo LinkSpecifications 18R/20R Internal Options Connector Pinout DetailUser Notes User Notes Crest P/N
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