Hi! Because it was hard for me to find all the info in this thread, I just want to drop my cents here, I had bought one of these a few months ago but never had the occasion to try it with a decent head.
So I've had two days rehearsing with an EBS proline 4x10... And man, after reading all the advice here, this head is SO LOUD and has a deep bottom, I loved it, my mateas loved it, still much to investigate but im delighted.
It pisses on my usual rig of Ampeg BA210 with an Eden 2x10, should be 483W, then the hartke sounds like 1000