I have the original bh500 check out you tube Uriah duffey demos it. Delighted with it tube tone compressor etc as it was my first amp I wanted something with bells and whistles eventually settling for a Traynor. Yba 200 tube
I still use it and might be worth while looking for one unless the new micro head is OK for you. The rebel head was going to be my next one but the valve Traynor came up ☺☺