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

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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