Arc Ref 75se vs D'Agostino Momentum Stereo


    I have the opportunity to upgrade (?) to a D'Agostino Momentum Stereo for a good price. I was previously using a bought new  Ref 75 se which blew 2 tubes at the 30 hour mark. Despite being biased every 2 weeks. However, not only did the tubes blow ( due to the deterioration of the of the cathode coating of 2 tubes, I was told ) and the biasing resistor, it took a big chunk of the gold trace on the pcb and shortened the transformers as well.  This caused quite a stir between me, my dealer and Arc which took several months to resolve as I'm not based in the US. In the meantime, I was using a loaner ref 110 to tide me over. To make a long story short, just as my replacement 75 se (new ) arrives, I get an offer from my friend on the Momentums.  I have been traumatized by this experience so I was thinking of staying away from Arc power amps ( I've read some posts on similar problems ) hence willing to the try the Momentums.
     I am basically a tube guy so an SS amp even though the Momentums are suppose to be warm they don't have that tube bloom which I can't seem to live without.  I've been doing an A/B the last few days between the Ref 110(I know is' not the same without the kt 150's and all ) and the Momentum cause in case I get the Momentum's I can sell the Ref 75 SE sealed in the box as in "new".  I can seem to decide as both have their strengths and weaknesses. The rest of my system consists of

Ref 6 pre
Von Shweikert Audio Vr 44 Aktivs
Estoteric K07 sacd/cd player
VPI Prime with ADS and Benz Micro LPS-MR
IC's are all MIT - oracle and shotguns
PC's are all Shunyata alpha series.
Speaker Cables MIT Matrix 28
Room size 35 sq.m.

    Points I am considering, synergy among the same manufacturer's, the Vr 44's  are active so I don't really need a lot of power just enough for the tweeter and midrange. But those Momentums look gorgeous and the deal is quite good. From my recent A/B tests, IMHO I noticed that the ARC does better with vinyl while the Momentums does better on Cd and streaming from my macbook to the esoteric. Help me decide, your inputs are welcome. This offer expires in a few days so I have to decide quick. Thanx.
 
attymbb

Showing 5 responses by attymbb

This is getting more interesting as my friend is willing to take on my ref 75se plus $$ of course. But he doesn't mind if I open it and do a real A/B between the ref 75se and the Dags Momentum instead of the Ref 110.

Appreciate all the comments.

randy-11, 
           Truthfully, I wish I could keep both. But I can't afford to because of a few more minor upgrades I would still like to do. And the wife is watching me like a hawk.

keithr,
          Yes, Arc did replace the Ref 75se to a new unit but took a while and if I'm not mistaken it was at my dealer's cost and not ARc's. I had my original 75se for 2 mo. The time it took to replace 6 months. Hence, the hesitation with further ARC gear. 

gpgr4blu,

         I have reached the same conclusion as you have. It's like splitting hairs. As I mentioned to randy-11, I wish I could keep both.
      

Zoera,

           There is definitely tube goodness between a tube pre and ss power, but even more with an all tube pre-power. There lies the problem. In my case, I wonder if it's enough.
charles1dad,

          When I mean "it's like splitting hairs" , I don't refer to the sound they convey,more on the fact they both have their own strengths and weaknesses which makes the decision that more difficult.

almarg,

          When my ref 75 se first blew up I had Harbeth SHL5+ then.
Thank you all for your replies.  I really appreciate it. I've decided to keep the Ref 75se. As much as the deal was good, it became  more about the deal and the reliability issue of the ARC than the music which is also what inna pointed out. The Ref 75se was always my first choice, which is  why I bought it in the 1st place,  except when it blew up on me it got me  thinking twice about it's reliability.  No offence to Agostino owner's, it's a mighty fine amp, but I'm just really a tube guy and the synergy between the Ref 6 and Ref 75 is really good in my opinion especially for my taste in music .Either way I have to deal with ARC/my ARC dealer anyway since I also have the Ref 6. Now, if it blows up again I'll cross the bridge when I get there. Hopefully, it was just a one-off bad unit.  I rather the use the extra money for some planned upgrades like a long IC's from pre to power as I plan to move gear from up front to beside my listening position.

inna,
        A turntable is actually the 1st on my list  of next equipment upgrades ( most probably a clear audio innovation )  and maybe my phono stage ( I forgot to mention it above, it's a Simaudio 610 lp ) it's sounds great but the adjustment/dip switches at the bottom/under of the unit is driving me crazy.