CAL Alpha DAC: Stock vs. 24/96 upgrade

Kevin,

I have 2 "stock" Alphas and just last week purchased an upgraded Alpha on Audiogon. I did what CKOFFEND suggested above and bought an upgraded version to compare. After listening for a week I have to say that there is a difference but not a $500 difference. If you invest in good tubes you will get more bang for your buck (IMHO). I used the Mullard CV4004s that came with my new DAC in my original Alpha and was floored (approx. $180 at Upscale Audio). I use Telefunkens and Mazdas in my other 2 DACs and am very happy with the results. These DACs respond well to NOS tubes and I highly recommend tube rolling before dropping $500 + shipping. I am very happy with both versions and can't believe the bang for the buck they offer.

Buda, Thanks for the info. Are you saying the Mullard CV4004's sound great in your stock AND upgraded Alpha? When I purchased my Alpha it wasn't being used by the previous owner for quite some time so it didn't sound that good the first couple of days I used it. On the third day something happened: It smoothed out & just sounded wonderful. So for now the Eico/Mullard tubes are staying in it. That doesn't mean I won't tube roll.
Kevin

The eico/mullards are tough to beat as long as they test strong. 5751's will definitely have a different personality.

You'll never get the $500 back out of it if you sell the unit. So, do you intend to keep it forever? Alpha are nice but I have never missed mine. A modded music hall or denon dvd will crush the alpha's sound.

Elevick, What personality do the 5751's have? I own a stock Denon 2930 DVD player. Have you heard one modded? Let me know. Thanks,
Kevin

Kevin, if you send in the alpha to the service company (Kevin there) will tell you to do this. Repairing these is a big part of his servicing of the Alphas.