I have the boss mt2 metal zone pedal and i jsut got it like 2 weeks ago off amazon. after the battery that it came with ran out, i tried another one and that didnt seem to work. I tried it with a dc adapter and it didnt work but on the pedal it says only to use a boss psa adapter. But since it didnt work with the enew battery or the adapter, is it broken?
Because you used it with an DC adapter, there is the chance you may have damaged it. Any 9volt AC however should work fine.