ATC SCM40A speakers

@lonemountain yep that's what I meant :) Thanks for the details. The more I learn about the engineering behind ATC, the greater is my appreciation for them. Cheers

@lonemountain Wow! Thank you for the information! Now I'm really worked up!

Couple thoughts — if you can get the v2 version as apparently the tweeter has been greatly improved among other things.  And I’m surprised nobody mentioned the midrange dynamic capabilities of the ATCs.  They will absolutely stomp the B&Ws in this area.  Best of luck. 

I've owned ATC 40 passive driven by Coda amplification, now 50 active and agree with all the above.

I aspire to own some SCM40a's, but am very happy with my SCM19 v2's, purchased from @lonemountain here in Vegas.  I have heard the SCM40's with the ATC integrated amp powering them (100wpc).  Sublime.

I power my SCM19 v2's w/a McIntosh MA-252 and I am filling a large space. I can play loud, but it taxes the little McIntosh's 100wpc (which seem to be less robust than the 100w in the ATC integrated amp).