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Phantom Power is a mystery

I was hoping someone could explain why a large diaphragm condsenser mic needing 48v, worked just fine today when I plugged it into an UltraSound AG-50DS4 acoustic amplifier at a music store when the amp is rated as only driving 15v for the XLR input ?

What is going on here ? Is there a problem hidden around the corner ?

Anybody ?

Bret

help needed with phantom power problem please?

i have a AKG c3000b condensor mic, a roland jx 305 groovesynth keyboard and a drum machine all connected to a Behringer eurodesk all running into Cubase sx, everything works fine and have been able to make some good recordings over the years, i wanted to record a jam the other day with guitar, bass etc but realsied when phantom power is switched on to enable to mic to work as well, the keyboar