Commercial Audio Series
3 Operation
3.1 Powering Up |
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1. | Turn off any equipment connected to the Line Out connectors. |
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2. | Plug the amplifier’s power cord into a |
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3. | Turn down the input volume controls. |
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4. | Turn down the master volume control. |
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5. | Turn on the Power switch. The Power indicator should glow. |
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6. | Turn the input volume controls in use about 3/4 up. |
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7. | Turn up the master volume control(s) until the desired loudness or power |
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level is achieved. |
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8. | Touch up the input levels as needed for equal loudness from each micro- |
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phone. |
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9. | Turn on any equipment connected to the Line Out connectors. |
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If you ever need to make any wiring or installation changes, disconnect the |
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power cord. | Figure 3.1 Priority Ducking Controls |
and Connectors
3.2 Priority Ducking
If you want a microphone to duck (turn down) the background music or other input signals, follow this procedure. On the back of the 140MPA,
1.Connect a
2.Adjust the VOX Threshold trim pot on the back of the unit to set how loud the voice must be before ducking occurs. It can be set for no ducking.
3.Adjust the Priority Release trim pot for the desired ducking release time.
The Active Indicator lights when ducking is active.
3.3 Music-On-Hold
On the back of the unit, adjust either the 1V or 1W MOH Level Control to obtain the desired level of
Operation Manual | page 13 |