called up tekkeon & they make the adapters so they plug in ONLY center positive, which works for me!
chris
This I spartially true.
Tekkeon designes the 3300/3400 to be Center (+) Positive. This is because most of tehir units are being sold here in the states, in which devices are generally all wired center positive. Over seas they are wired Center Negative (-).
However teh 3300/3400 units can be set for Center Negative (-). To do this you just rotate the adapter plug (180 degrees) and push down hard, as the plug may take some extra force to put in place as it is designed for center positive as was stated.
I did this, as I use the 3400 battery with my Edirol R4 recorder, which is Center Negative (-). Works great without any issues. I can run my R4 all night long (over 8-10 hours if needed) with phantom power on.
But the main point of my post is to inform those ehre that teh Tekkeon batteries can be setup for Center Negative if needed.