7
Operating Manual - MX-206 Stereo Microphone Mixer
6.3 Submixer In Larger
Sound System:
In this application
the MX-206 is used to up-
grade an existing sound sys-
tem by providing a vocal or
instrumental sub-mix to the
main mixer without tying up
a number of channels on the
main console. This tech-
nique allows the system in-
put capacity to be expanded
without installing more bur-
ied mic cables and without
changing the mixer that ev-
eryone is already comfort-
able with. Use the
Headphones Output to
achieve a "pre-mix" before
adjusting the main console.
Model MX-206
Made I n USA
100-120VAC
50-60Hz 15W
Phantom
Pwr.
Stereo
Outputs
Left
Right
Transformer
Balance d
Mono Output
Aux
Out
Aux
In
-L-
Ste reo Aux
-R-
Ch.6
(-20dB)
Pad
Ch.1
(-20dB)
Pad
Ch.2
(-20dB)
Pad
Ch.3
(-20dB)
Pad
Ch.4
(-20dB)
Pad
Ch.5
-20dB
Pad
PUSH
PUSH
PUSH
PUSH
PUSH
PUSH
Sub-Mix of Orchestra, Choir,
Percussion Section,
Area Microphones, etc.
Existing Main Console
7. TROUBLESHOOTING TIPS
7.1 No Sound
Check the AC power. Is the power switch on and
its LED lit? Check the level meters. If they are operat-
ing, the problem is between the mixer and the later com-
ponents in the system. If there is no meter activity, check
to see you really have an input signal and that it is on the
desired channel. Check that you have the master gain
controls at the desired operating level.
7.2 Distorted Sound
Something is being overdriven in the signal path.
If the clip indicators are active, reduce the channel gain
control and/or press in the pad switch on the rear panel.
If the output level meters are constantly in the red, re-
duce the Master gain and increase the gain of compo-
nents following the mixer. There are many gain
adjustments in the mixer itself and probably several oth-
ers in other system components which makes it possible
to overdrive an input section and then incorrectly try to
reduce the gain of the output section. The best way to
approach setting gains is to establish the operating level
of input stages first by setting their gain as high as pos-
sible 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, lim-
iters, crossovers, and amplifiers following the mixer in
the same manner, always working toward the later stages
of the system.
7.3 Excessive Noise
If the noise is in the form of hiss, the problem is
usually due to an input stage set up for low gain and then
compensating by increasing the master gain. Check that
the Pad switch is not enabled unnecessarily. Turn up the
channel gain controls and reduce the master gain.
7.4 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 sev-
eral power outlets has many opportunities for this prob-
lem to occur. If possible, feed everything in the system
from one power source with a common ground. Use bal-
anced input and output connections between widely sepa-
rated components.
If you need help, get in touch with your Ashly
dealer or call an Ashly technical service representative at
1-800-828-6308 ext. 125.