hi,

i recently got a 707 without a psu.
on the back it says that 12v DC are required, so i used a 12 DC
wallwart rated at 800mA.
the 707 won ´t power on.
my question is: how is the polarity of the wallwart the one i am
using has center negative....
the manual is of no help, so please do not direct me to that.

any help is appreciated,

creekree

oh, btw: this is my first post in this group, so hello y ´all!