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4

Phase

Use the Phase switch to improve bass response at low volume and suppress 
feedback at high volume. If feedback occurs, push the Phase switch. If feedback 

recurs when you change your location, press switch again.

Power

Plug in the guitar, and the Prefi x Pro switches on. The Battery LED will fl ash once 
at power-up to tell you the preamp is on.

Low battery indicator

When the Battery indicator lights steadily, it is time to change the battery. To 

conserve power, unplug the instrument when not in use. Replace the battery by 
fl ipping open the preamp body using the latch located at the top of the preamp. 
Be sure to observe the correct polarity during this installation.

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