Best ARC tube amps for classical music?

Actually the cream of the crop of that era are the M-100 monoblock amps.

Interesting Rgurney, I listened to the M-100's a few years ago on a Dunlavy based system and they were very dry in the mids ,IMHO. Personally, I way prefer the D70 or 115 to them, at least on the Dunlavy's. The midrange magic of the D70 and to a slightly lesser extent the 115 was MIA on the M100's. TETO.

I have a pair of M100s. They are the absolute best. Get them if you can find a pair. Make sure to get new PS caps (There are many many of them), or the amp will not be at its best.

Thanks a lot for the recommendations.
By the way, today I was offered a SP 10. So I am wondering if I should go for this one. Working ok though the electrolytic capacitors are unchanged.
Regards,
axtl

Axtl, I've heard but never owned a SP-10. They can sound wonderful. Many feel it is one of the best preamps ever made for a phono based system.

Here are some considerations:
* can be expensive to purchase due to reputation,
* two box system w/ separate power supply (may offer better [quieter] performance but requires twice as much shelf space,
* runs hotter than most preamps,
* many tubes so expensive to replace,
* like any component of this vintage, will require some restoration (electrolytics at a minimum), and
* if vinyl playback will not be a majority of your listening you may find several alternatives for less money.

Good luck.