Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications.
9/4/01
v.1.5
Architects’ & Engineers’ Specifications:
Each of the two input channels 1 and 2 has an
XLR low impedance (2.2k Ohm) microphone
and a high impedance (200k Ohm) 1/4"
Line/Instrument(DI) inputs with jacks conve-
niently located on the front panel and duplicat-
ed on the rear panel. Both inputs have sepa-
rate gain controls with wide gain range
(Microphone: 0-60dB and Line: OFF to +10
dB). The mic input has a –20 dB pad switch; a
phase-reverse (polarity) switch; a +48V
Phantom power switch with LED; and a switch-
able, fourth-order high-pass filter with 24
dB/oct slop and 75 Hz corner frequency. An
insert unbalanced I/O with separate 1/4" send
and return jacks is provided on the back panel.
Equalization consists of a shelving low and
high section and two fully adjustable paramet-
ric filters. The low and high shelving is a
Baxandall type EQ with 80 Hz and 12 kHz cor-
ner frequencies. The low-mid parametric sec-
tion is a symmetrical, bell-shaped type and
provides a +/-15 dB boost/cut within the fre-
quency range 100 Hz ~ 3 kHz and bandwidth
range 2 ~ 1/5 octaves. The high-mid EQ sec-
tions has the identical characteristics with the
exception of the frequency range, which in this
case is 500 Hz ~ 15kHz. The Level control
ranges from OFF to +6dB. The pan control
directs the signal between A and B summing
bus when the stereo/mono switch is disen-
gaged. The SmarTube™control blends the sig-
nal between the main channel with the signal
after the tube-sound processor circuit and
ranges from clean to all-tube sound. The pur-
pose of the tube-sound circuit is to replicate
the characteristics and the sound quality of a
microphone tube amplifier, by introducing the
harmonics structure typical for a tube stage.
This circuit utilizes solid-state technology. A
bicolor LED is provided to indicate that the
tube-sound processor is active (green) or over-
driven (red) to maintain a balanced sound
quality. The Sizzle switch introduces a slight (3
~ 4 dB), broadband boost within the high fre-
quency range. The mute (red LED) switch
mutes all channel outputs and the meter. The
output channel signal is monitored via 10-seg-
ment, multiple color LED array with –21 dB to
clip (2 dB before clipping) range. A separate,
green signal LED indicates the presence of a
signal (-20 dBu) through the channel, regard-
less of the mute switch position.
Gain:
Equalization:
Low Shelf:
Low-Mid Parametric:
High-Mid Parametric:
High Shelf:
Low Cut Filter (Mic input only):
THD:
Frequency Response:
Hum & Noise:
LED Indicators:
Phantom Power:
Power Requirements:
Dimensions (H x W x D):
Weight:
Mic: 0dB to +60dB (low Z)
Line: OFF to +12dB (high Z)
Level: OFF to +6dB
\Boost/Cut: +/-15dB, Frequency: 80Hz
Boost/Cut: +/-15dB, Frequency: 100Hz to 3,000Hz, Bandwidth: 2 to 1/5 octaves
Boost/Cut: +/-15dB, Frequency: 500Hz to 15,000Hz, Bandwidth: 2 to 1/5 octaves
Boost/Cut: +/-15dB, Frequency: 12,500Hz
Frequency: 75Hz, Slope: 24dB/octave
<0.005%@1kHz (22Hz –80kHz BW)
+0dB/-1dB, 20Hz –20kHz (Mic @ max gain, EQ flat)
(22Hz –22kHz BW) EIN (Mic 150 Ohm): -129dBu
Direct Output: -97dB, all controls OFF, -86dB, nominal settings, gains minimum
Switch closure indicators, 10-segment multicolor LED ladder indicates output level
(0dB = 0dBu unbalanced outputs and =+4dBu @ XLR balanced outputs)
+48V (Microphone XLR Inputs only)
Dom: 120VAC 60 Hz 15W, Exp: 230VAC 50/60 Hz 15W
1.75" x 19" x 10.5"
(4.44 cm x 48.26 cm x 26.7 cm)
8.2 lbs. (3.7 kg)
