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Operator Manual – MX-508 Mixer

Situation

No Sound

Distorted Sound

Excessive Noise

Excessive Hum or Noise

Note: Unshielded cables, improperly wired connections, and cable with broken strands are

the most common problems. Make sure you use good quality cable with connectors

soldered firmly on the correct pin. When in doubt, get in touch with your Ashly dealer.

Inches (Millimeters)

Action

Check the AC power. Is the power switch on and the front-panel LED illuminated? Check the

level meters. If they are operating, either the problem is between the mixer and the later

components in the system, or else the Output Mute switches are pressed. If there is no meter

activity, check to see you really have an input signal and that it is on the desired channel, or

check to see that the meter select switch is set to Left/Right. Check that you have the master

gain controls at the desired operating level.

Something is being overdriven in the signal path. If the clip indicators are active, reduce the

channel gain controls and/or press in the pad switch on the rear panel. If the level meters are

constantly in the red, reduce the Master gain and increase the gain of components following

the mixer. There are many gain adjustments in the mixer itself and probably several others 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

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.

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.

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.

Page - 9

Safety Instructions – 3

Introduction - 4

MX-508 Mixer – 5

Connectors & Cables – 5

Physical Description - 6

Installation – 7

Typical Applications - 8

Factory Configs - 8

Troubleshooting - 9

Dimensions - 9

Specifications - 10

Warranty - 11