My current amp, an old Sony will currently only power one of my 2 subs when bridged. They're Rockford fosgate 10" punch subs. Both subs work, however only one of the 2 terminals work on the amp. That said, I'm not too knowledgable on sound systems and would like help in figuring out a new amp to get. Preferably as inexpensive as possible. I don't need to shatter any windows or blow out eardrums, I just need something that will power my 2 subs and last me.