Dan D’Agostino and ARC Ref. 10

Should be no impedance match problems.
As the AGO is 100kohm input and the AR is is quite low (for a tube) output impedance

Cheers George 

I had a Dag Momentum with ARC Ref 40 in house to experiment with my Wilson Sashas. Absolutely wonderful in all respects. This combo is the perfect marriage of tube and ss for those who do not belong in either camp. I am sure they would work just as well for Evolution Acoustics MM3s which are fabulous speakers. 

Do you people think it will be a REAL step-up over my Rogue’s or shall I stay with tubes?

I am not a dealer for either, and quite frankly I would say yes. 

Rogue builds a great amplifier for the money but they have never been the tops in terms of speed or resoloution the amps bass is a bit tubby as well. 

Todays best solid state designs are much warmer and more involving than many of the older solid state designs. 

The only thing you may have to be leary of is that the ARC preamps are pretty neutral for a tube design with the Rogues leaning on the way warm side, so these two pieces balance nicely. 

The Krell has a hint of warmth, greater bass control, and far better dynamics. I would recommend you try the combo before you are fully commited as you may have to rebalance the system somewhat with a more netural amplifier.

Dave owner
Audio Doctor NJ

Grgr4blu, we have a customer with the Evolutions, they are nothing like the Sasahs, The Evolutions use an Aurum Cantus ribbon which is a much hotter tweeter than the soft dome of the Sashas.

So again you need to be careful as what you gain in dynamics, punch, clarity, speed and articulation you may find the slightly warm but more tonally neutral sound of the D'ag amps too much of a good thing.

It will come down to room acoustics, cabling, and digital front ends to see if the newer amp will work in those improvements while negating the more neutral voicing of that amp.

Dave owner
Audio Doctor NJ