HI, unfortunately I lost the power adapter of my Gemini FX 7000. I want to replace it with a universal power adapter with the accurate voltage but the connector is quite weird for a power supply (RJ 45) and there is no details about how it is connected inside. So do you have any ideas about how I can change the connector of a universal power adapter so it can work with mu unit? thanx

If the polarity, voltage, and amperage are the same, there is no reason that you cannot use this device as an alternate.

try a generic italy universal to italian travel power plug adapter.

Usually the manuf. have diodes used as protection against over voltage or adapter polarity issues. Try the correct adapter (sleeve and tip have specific voltage polarity...check for drawing denoting each) and if it fails to power the unit up, it's probably time for Digitech authorized repair.

Can you elaborate? What do you want to connect it to?

I'm having the same problem with the same PreAmp. Gemini PA-7000

Make sure you have the OFFICIAL Digitech power adapter. Universal adapters or those for MOST other pedals will NOT work... things may light up but you will NOT get audio. This unit requires an adapter supplying 9 VAC (not DC) at about 1 amp. These AC output adapters are not very common and people get the units without an adapter and try using universal adapters and they do not work. An AC adapter is used by Digitech so they can generate both plus and minus voltages internally. I don't know what your utility power voltage is in Cebu, so you need to get an adapter for your voltage that will give 9 VAC output and fit the power jack on the unit.

A lot of the effects chips run off of the +5 volt or +3.3 volt power source while a lot of the audio is off +/-12 or 15 volts. Sometimes loss of the +5 causes loss of the effects. Check that before assuming a chip is gone.

Rechargeable batteries CANNOT be used in this, ONLY alkaline batteries. Rechargeable batteries are ACTUALLY lower volltage (about 1.25 instead of 1.5) that is very near the cutoff point for operation so even fully charged rechargeables last only minutes. Sorry you used "universal" adapter because either you chose wrong polarity or too high a voltage and fried the internal voltage regulator. It is repairable by repair facility.

The PX-2 should work fine as long as you are on 120 or 110 volt service. If you have 220 volt power, you have done damage... likely to the PX-2 and probably to the power input circuits of the M13.
If you are on 220, then you need to use a TRANSFORMER type voltage reducer before going to the PX-2. If you are on 220, then replace the PX-2 and take the M13 in for service replacement of parts where the power comes in and is regulated.

I have a ZOOM GX1XN and it doesn't like universal adapters much. Using one with the wrong voltage or polarity may permanently damage your pedal. Try to obtain a proper ZOOM AC adapter (part number AD-0006 or AD-16) if possible. These are dual voltage and will work equally well with both 220 and 110 volts. Failing that you need an adapter that will give a DC (direct current) output of 9 volts at 0.5amps - maximum 4.5 watts. The outer contact (sleeve) of the adapter needs to be positive (+ve) and the inside contact negative (-ve). Lots of universal adapters are the other way around with the sleeve being negative - but some have a multi-connector on the end with both positive and negative sleeves.