Audio Horizons TP 2.0 Preamplifier

Have any of you TP2.0 owners compared it to any of the high end preamps? I've read about one comparison to the $16K First Sound so far. Any others like the ARC Ref. 3 or Callisto?

Has anyone compared the TP 2 to the ARC Ref.3? Would like to hear your opinions.
Thanks, Frank

Markwatkiss. CAUTION! Those are not replacements for a 6922 family tube. The 6H30 is the russian super tube that BAT first brought to the U.S.A. Now ARC uses them as well in their Ref. 3 preamp. Better check with Joesph if they will work in his circuit or you may damage your preamp.
Frank

Clio09. I believe it's the 6H23P. There are a couple other russian 6922's but the 6H23P is the highest military grade. I just ordered a cyro'd matched pair of this tube from tubeman.com. He claims they're much improved with the cryo treatment.
I also just received a matched quad of NOS 6H30P-DR's. I don't know alot about tubes but I just happened to research these two tubes this past week.
Frank

Clio09. That's interesting as well as confusing. In Markwatkiss's post above in referance to the 6H30P he says the mark after the 0 looks like an upside down u. My 6H30P-DR's have the same mark where the P should be. Looks similar to a lower case n to me. On the 6H23P-EB that I'm now holding in my hand, in place of the P is also this same mark. This is an origional equipment 6922 out of my Lamm 1.2 Ref. monos. So I'm just assuming that this mark is the letter P in Russian. I'm finding that the more I look into tubes the more that I need to learn.
Frank

Rgs92.
Luxman has a new preamp with tone controls also.

As we all know audiophiles look down on tone controls but will spend $100's and even $1000's on cables to do the same thing. I for one would welcome tone controls if it could be done without degrading the signal, perhaps as you suggested by switching it out.
Frank