From ZERO to Hero?

Thanks George!  As of now, those autoformers are definitely out.  Much appreciated! 

To the OP. Are you hearing problems or issues with your system ? These transformers are made as band aids to help with the amplifier / speaker interface, when impedance issues are present. McIntosh is the only ss amp company making autoformers as part of their design.

+1 on this.

Thanks mrdecibel! No, not hearing any problems/issues. Always looking for the best possible sound

Your PSA amps are perfectly capable of driving the ML’s without breaking a sweat, especially because the ML’s have their own bass amp, you will only go backwards putting an Autoforformer between them and your PSA amps, I have tried them on my ML based system and the Autoformer’s sounded limp and soft compared to without.

As Mr D said, the Autoformers can provide a "band-aid" solution for amps that can’t or have trouble with a speakers impedance load, but your better off saving the money as Autoformers aren’t cheap, sell the amp, and get an amp that will be happy driving the speaker.

Cheers George

@mrdecibel 
I only report what I have heard. Steve mentioned that using the Autoformers helped with Sound Quality even with his SS amps. I might give him or Pat a call to get further details.
I also know that Atma-Sphere recommends them for speakers with low impedance swings.
@OP, if only I had time to play around with my system would I install those autoformers.
Bob

Thanks clio09!  Good to know.  Did you hear any improvement? 

I use a pair with my Atma-Sphere M60 amps and Quad ESL 57 speakers and I don't hear any degradation of sound.

Thanks mrdecibel!  No, not hearing any problems/issues.  Always looking for the best possible sound and ran across these devices and just wondered if they would be a beneficial addition.  Thanks again!     

To the OP. Are you hearing problems or issues with your system ? These transformers are made as band aids to help with the amplifier / speaker interface, when impedance issues are present. McIntosh is the only ss amp company making autoformers as part of their design. To Bob. I do not know of any McCormack users using these as a step up in sq, as I do not see them as a benefit in the sq department. I wonder why Steve McCormack has never designed his amplifiers using output transformers. Has he even discussed using them in his owners manuals ? I prefer OTL amplifiers in sq, both in tube and ss designs. IMO, IME. YMMV. I am hoping Ralph, Mr. AtmaSphere, will jump in. Enjoy ! MrD.

Thanks Bob!  When you do get around to hooking them up, please drop me a note letting me know how you like them.  Thanks again! 

Though I bought a pair of Autoformers, I haven't yet installed them.
I got them because designers like Steve McCormack said they made things sound better regardless of the speakers impedance load.
So, why haven't I installed them? Too many things to do and I like how my system sounds as it is.
Bob