D’Agostino Momentum stereo vs D’Agostino Progression Stereo Amp

Wow, to be honest I did not expect any negative comments, 1981 and Krell is a long time ago though...but sorry to hear about that negative experience @mijostyn

The dealer in question should then have to possess both models, and offer the momentum at secondhand prices🙄

@bar81 I just read your system story, omg, nice to hear other audiophiles experience the same search for the holy grail!
Great to read the m400 dags deliver the goods, but at that time I guess the progressions weren’t available for comparison?
My future budget 🤪would not allow me monos, just a secondhand momentum stereo (or a new progression stereo which is even 5k more) and both of those are really stretching it way beyond what i can afford really.
Did you get a reason why the input board failed?
Would the dags sound closed in on speakers with soft treble themselves (I have old bw800 matrixes)?

@bar81 My speakers are nominal 4 ohms actually, thanks for your input!

Anyone had the chance to compare Rowland 725 or 825 to the D Agostinos?

@bar81 thank you for the long explanation, exactly the info I was after. Very interesting indeed that the buyer for the progression monos ended up with the m400 s instead based on sound!
I am still wondering what exactly in the sound is so different then.

 I do realise the monentums are twice the price, but I thought initial start up of the company, and complicated engineering to get big power into a smaller jewellery like box added a lot to the cost.

My worry is that maybe the smaller sized amp will be more prone to getting problems, as a big amp allows more space and airflow for all components.

My speakers are 93 db/1m sensitivity so loudest I ever see my mcintoshes meters go is around 10 watts on big movie soundtrack cds...

 I do not need wattmonsters, however 2 12 inch woofers wich loose damping, on each speaker do need good control. Impedance does drop to 3.4 Ohms at 118Hz according to Stereophile measurements. 
From your system info bar81 II found that Ayre Mx-r doesn’t do well below 4 ohms, is that valid for MX-R20 as well? 

Is there a considerable sound difference between the Momentum S-200 and S-250 then? 

That seems all good news guys, apparently Dan is more accessible and concerned then 30 years ago and the top product seems indeed to be just that then, no matter if it is smaller!
I look forward to hearing it! So far I just had the occassion to listen to the Progression Stereo at a high end show, but as you can imagine the big room was crowded, and speakers were great but a bit small for the room, so the impression was one that left me curious for more under better circumstances.

Would a highly transparent transistor pre (Halcro) work well, or are tubes more recommended. I will have to struggle for funds as is to get the power amp, so a D agostino pre is out of the picture atm...