I purchased one for the former guitarist in my band. He had the head, but was using my cabinet the entire time he was in the band. When he left, he was selling much of his gear. I bought a 6505+ 112 and traded it (plus cash) to him for his head. When compared, the head was much clearer. The combo sounded much fizzier, especially at low volume, even when run through the same cabinet. Once I opened it up, I could start getting more usable sounds.
He liked it, but when last we talked, he barely plays.