I traveled to Maine picked them up and now they share a home with my JansZen zA2.1, and SoundLab A-3. This is my third pair since the early '70's. The first 2 pair where damaged and/or taken apart by 'friends' while I lived in Calif.(I presently live in NYC)
I love them and I power them with either a Futterman H-3a or Accuphase P-300. I also ran the 2nd set with a Nad 20w receiver for a year or so, they sounded lush, but lacked the refinements of the better amps driving them.
I have read so many opinions on or about the Nines by people here and in other places and while some ring true, other opinions seems like a regurgitating or paraphrasing of what others have said seemingly with out actually experiencing the Nines first hand. But all in all for the years I did have them they proved to be reliable as with the Futterman which is 42 yrs. old.
I am going to replace the selenium diodes with 1N4007 recommended by both Dr.Close and David JansZen.
I have run the 1st pair with the Futterman which I picked up along with them in 1972. I still use the same Futterman today. Its been a strong amp despite the abuse I gave it at times. Those Nines where taken apart by people subletting my NYC apt while I was in Calif. for a few years. I picked up a 2nd pair of Nines from a chap in Texas in the 80's but I damaged them with moving to a different living location. I dismantled the Nines keeping the bass panels, tweeters and after depotting, the transformers since they were not damaged. So now that I have another set, in case I ever need replacement drivers, I'm all set.