I'm now assuming that David is the guy behind support.. So.
Supply was designed for speakers, dunno what kind of. Found it in a big box full of different sized speakers & power supplies, just wanted to try if it could be right for the job.

I truly thank for everyone's help on this issue. But since I really don't know that much about electrics I dunno what should I find out and what's important.. That's why I'm asking..