ATC 50 active is simply a screaming deal when you factor in the amp cost/matching as part of the deal and done. And yes, I own them. And yes, I’ve owned enough equipment to fill a Listen Up store.
A few things to know: They hate bad recordings. They hate bad source. They like XLR preamp out and not RCA to XLR conversion at the speaker end. They like Gaia footers, they love Townshend platforms. They love Furutech 4.1 power cords.
I could not optimize performance with tube preamps. They were too slow. Class A Sugden preamps and my current Luxman C 900u preamp filled the bill.
Best of luck slaying the dragon.