Sorry for the dejavu. Yes I planned to get an MC7150 sometime ago but had work travels and eventually the amp was sold. I just managed to get a good offer recently on the MC7150 in very good condition and hence, just wanted to be sure with the more experienced folks here on whether it will be an upgrade purchase. Appreciate all your inputs.
Just wish to update that I have now (finally) purchased the MC7150. It has now replaced my MC7100 running into a vintage C15 and my Living Voice Avatar II speakers which are pretty sensitive at about 94db@ 6ohms
My initial thoughts after early listening is that the autoformers do make a difference especially to soundstage, musicality and vocals. The vocals sounds so smooth and silky, compared to my MC 7100. The MC7150 has tad bit of warmth yet brings out the details and has a much wider soundstage than MC7100. In terms of musicality, the MC7150 is certainly several notches above the MC7100 and a sheer pleasure listening to, though the MC7100 is no slouch. The upper registers in 7100 can tend to be slightly shrill yet still very listenable but in the 7150 it's more refined, much more easy to listen to.
Bass wise, twiiii is right. The MC7100 delivered a tighter and deeper bass punch compared to the MC7150. I felt that in most songs. The 7150 bass is decent, not that the bass is flabby but the 7100 has more heft and weight.
So on the whole, to my ears, I still prefer the MC7150 for the sheer musicality and involving music it naturally delivers. Plus the blue meters are certainly inviting to look at. The music just lures you in. Thought there is some loss in bass definition compared to MC7100, it's a keeper for reasons I have mentioned.
I need to perhaps add a sub, or upgrade my preamp to a C36 or C34v alternatively ( compared to the C15 I have now). Will this make a difference? Happy to hear your thoughts.
Thanks