The original passive SCM10 from the late 90s
Tried with half of dozen amp ranging from 55 Watt tube amp to 300 Watt SS amps. The amps are ranging from $1500 to $6000 in the used market. The preamps are also ranging from $1500 to $3000 in used market. Yet to hear a better bookshelf monitors in my current setup.
What attracts me about the ATC is its mid range and lower frequency response. It has silky highs with big sweet spot mids and exlosive low frequency response.
I prefer drive it with my 60 Watt/ch tube amp.
Although it is not a large speaker that can fill the whole 360 sq ft listening area, the combo is very nicely balance for my room size.
