I had one last year...I could never power it and get solid results.
I started with a pocket gen...little 12v ac convertor
Worked well for about 5 shows then crapped out, started making wierd buzzing noise all the time.
then i tried a ac convertor from rat shack and it worked ok, but as time went on I got less and less time outta the batteries before the buzz came back.
I eventually decided I needed too mush shit to make it run so I sold it on ebay
its a nice unit for the $...and it will do a lot!!!
I didnt use it with my current mics but one time and its full of buzzing.
I used it with my rodes and did not like the sound at all
tooooo loooose