Guys, that's a switching power supply - I have the exact unit. It says output is 12v at 4A and shows both a solid line and dotted line next to this spec. I think that means intermittent DC right?

Anyway, hooking up a straight 12v ac/dc converter probably won't do the job and/or will fry the electronics. Also, anything that puts out more than 1A is going to be more expensive than a universal adapter anyway.

I'm no expert, but if the manufacturer could get away with a cheap 12v continuous dc power supply, I'm sure they would.