Atma-Sphere in CO?

@tomic601 Will do.

I'm sorry, I just have to say this.
Due to the elevation, the ATMOSPHERE in Colorado is very thin.
Please forgive me.

Well, I left the M-60s on for about a week and then compared again to my my Franks. As Ralph had intuited, they did improve and narrow the gap between the two amps.  Once again, I was impressed by the bass control and grainless sound.  As before, however, the Frankensteins performed better on 3-dimensional sound and naturalness of voices and instruments.  I wish I could just magically combine the two amps, but in the end decided to return the M-60s to The Music Room. 

@tomic601 I'll probably be taking them up to Broomfield next Wednesday.  For other potential buyers, they do come with VT-231 Ken Rads and RCA smoked glass tubes  I think the 6SN7GTBs are Sylvanias.  They should really advertise that in the ad...  

@cal3713
It sounds like these amps were used- any idea what version they are? The current version is Mk3.3 (older versions can be updated with full warranty reactivation).

@atmasphere I never found out from TMR. They had the 6sn7s in the 2x2 configuration, but had rounded edges on the power supply cover.  

Would love to hear a fully updated version at some point in the future, but only have funds for the units themselves at this point.