Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications.
9/4/01
v.1.5
test conditions:
reference:
INPUT SPECIFICATIONS
EIN:
preamp gain range:
input impedance:
priority (channels 1 and 2):
phantom power:
input sensitivity:
maximum input level:
common mode rejection:
OUTPUT SPECIFICATIONS
frequency response:
THD:
signal/noise:
output impedance:
nominal output level:
maximum output level:
GENERAL SPECIFICATIONS
channel clip LED:
output level indicators:
power requirements:
dimensions:
weight:
120 Vrms, 60 Hz line voltage maintained throughout testing
0 dBu = 0.775 Vrms
-128 dBu (R s = 150 Ohms), typical
10 dB - 65 dB (MIC inputs)
-13 dB - 44 dB (LINE inputs)
2K Ohms (Mic inputs)
>10K Ohms (LINE inputs)
>10K Ohms (INSERT inputs)
0 dB to 9 dB
+48 Volts
MIC inputs -61 dBu
LINE inputs -40 dBu
INSERT inputs +4 dBu
MIC inputs +12 dBu
LINE inputs +30 dBu
INSERT inputs +21 dBu
>70 dB 20 Hz - 20 kHz
75 Hz (-3 dB) to 20 kHz (-1 dB)
(at +4 dBu; reference: 1 kHz; 75 Hz HPF)
>0.1% at +4 dBu (22 Hz - 30 kHz BPF)
(R s = 150 Ohms; 30 kHz LPF)
>85 dB (all controls fully CCW)
>200 Ohms
LINE level output +4 dBu
MIC level output -26 dBu
INSERT outputs +4 dBu
LINE level output +21 dBu (hi-Z load)
+18 dBu (600 load)
MIC level output -9 dBu (hi-load)
-12 dBu (600 load)
INSERT outputs +21 dBu (hi-Z load)
red LED lights 2 dB before clipping
also lights to indicate mute on channel 1 and 2 inputs
red LED lights 2 dB before clipping
yellow LED lights at +4 dBu
green lights at -16 dBu
120 Vrms, 60 Hz domestic
230 Vrms, 50/60 Hz export
15 Watts nominal
1.75”x 19”x 9.38”(45 mm x 483 mm x 238 mm)
7.5 lbs (3.4 kg)
Architects’ & Engineers’ Specifications:
The automatic microphone mixer shall have four elec-
tronically balanced, low noise microphone/line inputs.
Each input shall have its own gain control. Input 1 and
2 shall each have the patented Priority Control
Circuitry with a priority assign and individual front
panel mute controls. Each channel shall have individ-
ual line level inserts with enable/bypass switch. Forty-
eight Volt phantom power shall be available on all
channels and be switched on inputs 1 and 2. A secu-
rity cover is included, protecting the main controls on
the front panel with marking zones for each input. The
master section shall be equipped with gain manage-
ment computer logic for seamless operation. There
shall be a balanced mic or line master output with
switch. In addition, there is a master, unbalanced aux-
iliary output. There is a master/ slave linking connec-
tion and switch on the back panel for connection to
additional AM-411 units, and also the AM-811 as well
as the MM 623 mixer. All audio connections shall be
made with removable “euro”type connectors. The
mixer shall have a frequency response of 75 Hz to 20
kHz +/- 1 dB. It shall have an EIN of -128 dBu and the
total harmonic distortion shall be less than 0.1% at +4
dBu (22 Hz to 22 kHz BPF). The maximum line output
level shall be +21 dBu (hi-Z load), +18 dBu (600 load).
The unit shall be packaged in a rugged metal chassis
19”wide by 1.75”high by 9.38”deep. The unit shall
operate from 120 VAC, 60 Hz domestic and from 230V
AC, 50/60 Hz export.
