Wow...great question. Stretching memory, I would say a high current, high quality Class A amp perhaps.
I have only read about Bully Sound, but it is designed by Bret D'Agostino (Dan D'Agostino's son), and shares some of his father's philosophies...built like a tank, high current/reserves, it is Class A I think, and even looks like the old Krells.
If you can find HifiCritic (Martin Colloms), they did at least 2 reviews and highly recommended them.
Good luck.
I have only read about Bully Sound, but it is designed by Bret D'Agostino (Dan D'Agostino's son), and shares some of his father's philosophies...built like a tank, high current/reserves, it is Class A I think, and even looks like the old Krells.
If you can find HifiCritic (Martin Colloms), they did at least 2 reviews and highly recommended them.
Good luck.