For a good number of years I had the less powerful SET Cary CAD 301, and it drove ProAc Response 2.5's very well indeed.
It's worth sinking a couple of hundred bucks in your 300B to explore if it can be revived or not.
If not, then I third the Quicksilver rec.
It's worth sinking a couple of hundred bucks in your 300B to explore if it can be revived or not.
If not, then I third the Quicksilver rec.