Crest audio X-EIGHT RT User Manual
wide range of configurations
X-Eight consoles are supplied with either 24, 32, 40, or 48 mono
input channels, plus four full-featured stereo line-input channels—
which can also serve as effect-returns. These standard configurations
include Master and Group modules—all other inputs may be
ordered as mono-mic/line or stereo-line, in four-channel blocks.
microprocessor-based muting system
The X-Eight RT’s straightforward microprocessor-based muting
system was co-developed with JL Cooper, and combines muting
flexibility with ease of operation. Eight manual-mute groups are
provided, each with a dedicated activation-switch, any number of
which may be activated at one-time.The system includes 128 MIDIbased sequential scene mutes that can work alone, or in conjunction
with the manual mute groups. Scene mutes can be controlled via
external MIDI signals, and each of the 128 mute scenes may be preset to issue a MIDI program-change command to an external device.
• four-band eq with sweepable mid-bands and high-pass filters on all inputs
• separate eight-track record output and monitor inputs allow live-sound
recording without compromising the house-mix
• microprocessor-based muting system enables outputs
to be used for special-effects in theatrical applications
• multiple outputs, including ALTERNATE OUTPUT, MATRIX 1– 4
and dedicated
ASSISTIVE LISTENING outputs
• direct-output on all mono input channels
• five-segment LED level indicator on all mono input modules, with variable
intensity
SIGNAL PRESENT indicator and multiple sample-point PEAK indicator
• eight auxiliary mixes, with AU X 5/6 and AUX 7/8 switchable to stereo-operation
• stereo solo system, features switchable
AFL/PFL mode
and
LAST-PRESSED functions, with master SOLO CLEAR switch
• discrete bus assignment to groups, left/right and mono outputs
• true
LCR panning available on mono input channels
• separate ground-compensated insert sends and balanced returns
• fully-balanced primary outputs and balanced mic and line inputs
• meter bridge—thirteen mechanical meters with solid-state illumination:
eight groups, left, right,mono (center) and solo-left/solo-right
description
features
The X-Eight RT console is designed specifically for sound contracting, industrial, rental, and installation applications. A live performance, front-of-house console suitable for veterans and beginners
alike, the X-Eight RT includes identical four-band eq on all mono
and stereo input channels. Auxiliar y sends 5/6 and 7/8 may be
switched between mono or stereo operation. Signal monitoring is
provided on all input and output fader channels, assisting the
operator in setting correct gain structure throughout the console.
Stereo full-facility input channels are used for effect-returns on all
faders. Independent recording output and tape monitoring facilities
are provided that will not interfere with live-performance production, and which may also be used as special-effects outputs and
additional line-input facilities for theatrical applications. A microprocessor-based muting system is provided on both inputs and
outputs, and may be operated manually or in sequential-mode.
sound fundamentals
Even in the most demanding environments, the sonic performance
of the X-Eight RT is sure to please discriminating sound engineers
and audiences alike. The X-Eight’s circuitry delivers both extended
headroom and low-noise: exclusively employing the latest-generation of integrated circuits and studio-grade proprietar y-design
microphone pre-amplifiers.The X-Eight RT console exhibits exceptional phase-shift performance, revealing less than +/-30 degreesof-shift from input to output—significantly better results than most
consoles, regardless of price.
built to defy murphy’s law
X-Eight RT consoles are manufactured to the same exacting
quality-standards as all Crest Audio console products. Each input
channel has its own discrete vertically-mounted circuit board, for
greater impact resistance and serviceability. All circuit boards
employ plate-through double-sided glass epoxy construction—
providing greater strength and integrity. The console’s road-worthy
external frame is fabricated from 14-gauge galvanized steel.
X-Series power supplies utilize amplifier-engineering technology to
deliver stable voltages and long-term reliability, and provide built-in
facilities for a redundant back-up supply—ensuring that the show
will always go on.
X-Eight RT console
specifications
Crest Audio specification literature is available
in downloadable PDF format at our website
www.crestaudio.com
©n
2000 Crest Audio Inc.
Crest Audio reserves the right to make
improvements in manufacturing or design
which may affect specification.
X-Eight RT
v.1.0 1/24/00
+0/-1dB 20Hz–20kHz ref 1kHz—any input to any output
any output <.01%
THD 20Hz–20kHz @ +15dBu out
mic ein better-than -128dBu 20Hz–20kHz—150ohm source, 60dB gain
channel mute >80dB channel routing >80dB
channel fader attenuation >90dB aux send attenuation >75dB
< +/- 30 degrees,
20Hz–20kHz—mic-in to main-out
mic-in
XLR 4k ohm balanced—max voltage gain to left/right balanced out
=
98dB
line-in TRS >10k ohms balanced
left/right/mono—group, aux, matrix—monitor-out
all 100 ohms balanced
headphones to drive > eight-ohms
send 50 ohms ground-compensated on
TRS jack
return >10k ohms balanced on TRS jack
+4dBu max level
+26dBu balanced into >1k ohms
high freq +/- 15dB shelf at
12kHz
hi-mid freq +/- 15dB bell freq range 400Hz–8kHz Q=1.5
low-mid freq +/- 15dB bell freq range
80Hz–2kHz Q=1.5
low freq +/- 15dB bell-boost /shelf-cut freq center 80Hz Q=.7 on boost
high-pass filter -12dB/octave freq range
20Hz–400Hz
separate on-switches for eq and high-pass filter
eight independent tape returns—with assignment to main left/right/mono buses
plus aux-sends for aux 5–8
five-segment
LED ladder with VU-type response—displays pre-fader signal level
top red-
LED warns of impending overload—anywhere within the channel, lowest green-LED shows signal-present
thirteen mechanical
VU-type meters with LED-illumination
eight-meters showing group-outs
three-meters showing main-outs (left/right/mono), and two dedicated solo-meters
pink-noise generator can feed the talk-back section
chassis is powder-coated
14-gauge galvanized steel with internal-bracing
modules are powder-coated
18-gauge galvanized steel with baked-epoxy screening
see dimension-drawing
five-years
frequency response
THD
noise
crosstalk
phase shift
inputs
outputs
insert
nominal output level
input channel eq
output features
channel metering
master metering
signal generator
construction
dimensions and weights
warranty
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