Recommendation for ATC SCM150 Amp/Pre

@ei001h with the ATC passives? Audia Flight FLS-9 Integrated amp ( has the horsepower), Moon 641 integrated.

In prior systems have had many amps (as an EE, I have a passion for power amps)

In no particular order: Luxman M-900u, Simaudio 870Av2, Pass x350.8/250.8/ INT 250, INT 60, XA30.5, X250.5, Simaudio 330A, 760A, Coda CSIB, ARC 100.2, ARC VT100MKII, Primaluna HP , Octave V110, Octave V80SE, Cary SLI-80, Sugden A21, Marantz PM-14S, McIntosh MA-6900, Ayre VX-20, Benchmark HPA2, Bryston 4BSST2, 4B3, McCormack DNA 0.5, DNA1, DNA 125, DNA225, Luxman 509x, 595, 590mkii, 507uxii, Hegel H190, H390, H590, H30; Aragon 8002, Parasound A21, Rogue Audio St100 and the Integrated forget model number; there are more but it’s been a long day.

The Simaudio 761 is special and I’m 100% sure the 861 is even more so. You can’t go wrong.

Have you ever read ATC reviews comparing the active version against the passive version. The active version wins quite clearly every time. The biggest problem driving a speaker is the lousy reactance of a passive crossover. That's why really good 6 figure amps with what seems like ordinary specs sound better, expensive power supplies that can drive a lousy load. A good active design solves this much less expensively. Change your order to the active version and save money and get better performance.

Op we were electro dealer for many years the aw 400s are excellent however the best combo we eve heard with our atcs was the Coda 16 power amplifier which had even better bass control and slam while also having a rich well fleshed out midrange, and a much wider sound-stage,then the electro amplifiers  and we combined that with the awesome zesto leto line stage the sound was incredibly life like  and vivid we were talking about that particular demo for weeks after wards.

Dave and Troy

Audio intellect NJ

Atc, Coda and Zesto dealers

The Bryston 14B3 is worth a look. 

@dynamiclinearity I spent hours with the active SCM40’s and passive SCM40’s; The active system used the ATC top preamp/ controller. The passive setup used a Moon 641 integrated amp; same DAC as source and same room, same speaker locations. I preferred the passive setup. Sounded better to me. It’s not always the case that active is the obvious choice. YMMV of course.