Goldstar amp


I recently got an old amplifier from a friend, a Goldstar 754.

Does anybody know anything about this amp, ratings etc..
I've searched the web but I didn't find anything. I'd be happy to post a picture or report what kind of output transistor are used, if it might give you an idea of this rather large amps ratings.

I intend to drive my two 2*10" subs with it. It's got quite a big xformer, but there's only like 4700 micro F per rail. Maybe I should add some more caps?

Best Regards
/Christian V