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Connections
It�s easy to interface the Dual MP with other equipment. XLR input and output connectors are located on the rear panel. Additional 1/4� unbalanced outputs are located on the rear panel and 1/4� instrument/ line inputs are located on the front panel for accessibility. The Dual MP�s XLR connectors follow the AES standard of: Pin 1 = Ground, Pin 2 = Hot (+), Pin 3 = Cold (-). Ideally, one input per channel should be used at a time. However, because of its design the Dual MP can be hardwired into a rack without having to disconnect the XLR inputs when using the front panel jacks. If no load is placed on the XLR input (no instrument or microphone connected) the front jack will function as if there was nothing connected to the XLR input. Both Dual MP inputs may be used simultaneously. However, the two signals will sum and the signal present at the XLR jack will tend to attenuate the signal of the 1/4� input. Both balanced and unbalanced output connections may be used simultaneously. This is particularly useful when using the Dual MP as a direct box for instruments or line level signals. **Note: If you experience a grounding hum when using both output connectors (one to the console, one to an instrument amp) simultaneously, a ground loop may be the problem. To remedy this problem, disconnect the ground wire (pin 1) from the XLR cable plugged into the Dual MP�s output. This interrupts the ground path and therefore breaks the loop.
Controls, Switches and Indicators
Power The Dual MP is powered by an internal power supply. The Power switch and indicator LED are located on the front panel. If the attached power cord ever becomes damaged, discontinue use until you can have it repaired. Phantom Power Switch Each channel of the Dual MP can power any microphone needing +48 volts DC of Phantom power. The Phantom power is engaged and disengaged with this switch. Phantom power is supplied to pins 2 and 3 of the XLR input jack.
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