Would McIntosh Auto Transformers affect speaker sound?

I have an mc312 running Sabrinas and chose the 4 ohm taps. I'm sure many other amps sound good too. No regrets or complaints. Happy listening 🎶.

Audiotroy, stop polluting threads.... 

Speakers don't stay at a fixed ohm read the reviews they differ depending on frequency some or the reviews say some speakers dip down to one ohm .so you need an amp that can handle that and not overheat and damage the amp.mcintosh gives that option to match the impedance but it's not good to hook a 8 ohm manufactured amp rating to a 2 ohm speaker load.the reviews are clear on this.thats why different amps match certain speakers.i have read several reviews that suggested playing with the taps at different speakers to find what sounds best.it would be nice to have a brick and motor store that would let you try different combinations and find the one you like.we are all different in the sounds we like.im happy with my mc 1.25 kw but also the michi m8 and parasound halo musical fidelity m8 and even the carver 760 mono sounds good on some speakers.enjoy the music.you can't get around ohms law.

I am 72 and tinnitus has ruined my critical listening capacity, but my first job in HiFi was at a McIntosh dealer. At age 21, my ears were fine, and although I thought I knew a thing or two about audio, I was really just beginning to learn. Our demo system was a C28/MC2105 combo. We demoed from a Pioneer 10” reel to reel playing tracks recorded from a Dual 1229 with an Audio Technica AT15S. Our favorite speakers were ESS AMT-1 Towers. My reading had led me to conclude a Crown DC300 and IC150 should outperform the Mac gear, but listening to each in our sound room proved otherwise. This was all played through 12 gauge zip cord of course…Noel Lee hadn’t happened yet. But those auto formers sure didn’t hurt the sound…

I like more open, unveiled sound.  I've heard MAC many times.  I just can't warm up.  Their amps have plenty of power and are cool looking.  Product loyalty is their big deal.