I run my SCM40V2’s with a Cary SLP05 with ultimate upgrade and Raytheon VT231’s and CBS Hytron 5692’s (latter in input buffer). I have a hard disagree with use of the passive or active versions with a tube preamp. I replaced my otherwise excellent but hard sounding SCM35’s with these speakers, so 22 years of living with ATC speakers. I think my setup (with a SST Son smp) sounds better than any combo driving these speakers (including ATC electronics). I haven’t heard anything below $10K that matches the passive version, and IMHO if you get the active version, a tube preamp will slightly soften the edge on the sound but will give a better spatial sense of air around the instruments and make the sound more lifelike.
