ST 70 best sounding version?

I was searching for the link that rodman provided. I have not heard the new series 3, but it is selling for $1,500 when its price when it was introduced just a couple of years ago was $3,000, so it was obviously not too popular.

So bear in mind I have not heard it or any of the modded ones, but it is the one I would purchase. I do have the original ST70 with the desirable cloth lead transformers (I think that what they were referred to as), an original with the Japanese sourced transformers and a series 2 made by the Panor corporation. I just purchased another amp and will be putting these up for sale when I get around to it since I don’t need them all.

And while bdp24 is surely right about design flaws, I love mentioning that the ST-70 is the greatest selling amplifier of all time.  I will sheepishly mention that mine are in storage at this time.

Per the Absolute Sound article titled - The Ten Most Significant Amplifiers of All Time - "Along with Avery Fisher’s 500c, David Hafler’s ST-70 put high performance audio in the American home. Introduced in 1959, the ST-70 is the world’s most prolific stand alone amplifier with over 300,000 units manufactured. Amazingly, its clear, three-dimensional sound is comparable to many amplifiers made today."

Interesting reading about the RM-10.  Does anyone know what the differences were before the RM-10 and the RM-10 MKII?

I needed some music in the room I have placed my treadmill.

I hooked up my all original Dynaco ST70 to an even older Heathkit AA141 tube preamplifier that a friend gave me years ago. Tubes used in the Dynaco are old stock Mullard el34s and rectifier along with RCA or Amperex 7199’s (I can’t remember). I threw some inexpensive Chinese 12ax7s that I had laying around in the Heathkit..

Hooked up to a Yamaha T85 tuner and B&W DM110 speakers, this antique system is surprisingly pleasant.

So bottom line, the Dynaco ST70 in its original configuration can sound OK.