I picked up a powered home subwoofer at a garage sale. It did not have its power adaptor. All it shows is 12V DC (by the symbol) 2.5A. But it does not show the polarity anywhere on the subwoofer. Is there any way a rookie can figure out what the polarity is?
The subwoofer is a Granger Bessel brand. It was probably part of a home theater setup, since it does not show a model number on the subwoofer.
Thanks for any suggestions you can offer. If I can't find out anything, I will just try + polarity. It was just $10, so no real loss if I smoke it.