Ashly MX-406 Руководство по эксплуатации - Страница 10
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Operating Manual -MX-406 Stereo Microphone/Line Mixer
stages first by setting their gain as high as possible but leaving about 20dB of headroom for loud peaks, then move on
to set the master gain to produce a good meter reading. Proceed to set the gain of equalizers, limiters, crossovers, and
amplifiers following the mixer in the same manner, always working toward the later stages of the system.
8.3 Excessive Noise
If the noise is in the form of hiss, the problem is usually due to an input stage set for insufficient gain and then
compensating for it by increasing the level. Try increasing gain and reducing level. Also, check that the -20dB rear
panel pad switch is not unnecessarily enabled.
8.4 Excessive hum
This is usually caused by "ground loops" in the system wiring. A complex sound system with many sources
separated by significant distance and using several power outlets has many opportunities for this problem to occur. If
possible, feed everything in the system from one power source with a common ground. Use balanced input and output
connections between widely separated components.
If you need help, get in touch with your Ashly dealer or call an Ashly technical service representative.
9. SPECIFICATIONS
DISTORTION
THD at +4dBu output, 20Hz-20KHz . . . . . . . . . . . . . . <0.05%
THD at +12dBu output, 30Hz-10KHz . . . . . . . . . . . . . <0.05%
IMD (SMPTE) at +12dBu output . . . . . . . . . . . . . . . . . <0.05%
HUM & NOISE (20Hz-20KHz at max preamp gain)
equivalent input hum and noise . . . . . . . . . . . . . . . . . . <-128dBu
residual output noise
all levels at minimum . . . . . . . . . . . . . . . . . . . . . . . . . . <-100dBu
master levels at nominal
all channel levels at minimum . . . . . . . . . . . . . . . . . . . . . <-90dBu
aux master at nominal
all channel aux at minimum . . . . . . . . . . . . . . . . . . . . . . <-90dBu
master levels and one
channel level at nominal . . . . . . . . . . . . . . . . . . . . . . . . . <-68dBu
MAXIMUM VOLTAGE GAIN (±2dB)
MASTER
Mic/Line Input to Master Outputs . . . . . . . . . . . . . . . . . . +84dB
Mic/Line Input to Mono Output, 600 ohm load . . . . . . . +84dB
AUX SENDS
Mic Input to Aux Master Output, pre ch. level . . . . . . . . . 84dB
Mic Input to Aux Master Output, post ch. level . . . . . . . . . 97dB
Stereo Line In to Master Output . . . . . . . . . . . . . . . . . . . . . 27dB
FREQUENCY RESPONSE
20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.5/-1.0dB
EQUALIZATION
Bass
. . . . . . . . . . . . . . . . . . . . . . . ±12dB at 70Hz, shelving
Treble
. . . . . . . . . . . . . . . . . . . . . . . ±12dB at 8KHz, shelving
CROSSTALK
adjacent inputs, 20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . <-65dB
10
VU METERS
Stereo outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -21 to +6 VU
0VU = +4dBu
PEAK INDICATORS
Peak Clip indicator on each input channel and left and right out-
puts, illuminates 3dB below clipping
PHANTOM POWER
+48 VDC applied to all Mic Inputs, switchable on rear panel.
Maximum total current draw = 80mA. Maximum single channel
current draw = 14mA. Gradual power-up and down to eliminate
"pops".
SHIPPING WEIGHT
13 lbs. (5.9kg)
POWER REQUIREMENTS
100-240 VAC, 50-60 Hz, 30 watt
DIMENSIONS
19" x 3.5" x 9.4" (483mm x 89mm x 239mm)
*unless otherwise stated, specification conditions are:
150 Ω source, maximum preamp gain, all other controls
set at nominal, XLR output into 600 Ω or greater.