Audio Horizons TP 2.0 Preamplifier

I just have to toast your auditory memory. You are listening throughout a 100 hour break-in and still remembering what the unmodded 2.0 sounds like for comparision. I would have to have the units side by side and do my comparisons that way unless the differences were very dramatic. I am very interested in your impressions as the units break in fully - that will determine whether I take the plunge. Perhaps I will compare my unit directly to a new 2.1. to get a flavor of what the ungrades will do. I use the balanced outs.

Joe,
I realize that the auditory memory is poor, however, being a musician and being very familiar with the live sound of instruments,I remember what the each preamp gave me in terms of reproducing recorded instruments which I am familiar with. I am going to continue listening nightly to my "new" preamp as it continues through its break-in towards the 100 hour mark. Stay tuned.

Ah, so you use as your benchmark the welll memorized live instrument and then remember the comparisons to this. Do you keep notes as you go along?

Only mental notes. I would like to have the two preamp versions side-by-side, but I will know in due time if I prefer this upgraded version to the old. So far, the new version does some things better, but the "breath of life" is still not quite there. The preamp has roughly 70 hours on it at this time. Thirty more to go.

Got the CCAs today opened up 2.1 and i must say the layout is superior. Removed the ecc88s that Joseph included cleaned and used the smallest amount of walkers sst on the pins. Joseph had small rubber dampers on the 88s so i put them on the CCAs and installed them in 2.1.
Right off the bat the difference is quite audible. I was told that 80 plus hours will be needed for the nos CCAs to get well broke in.
The only thing i have noticed is a ping from the left side when you tap 2.1 that wasnt there with the 88s.
Now i think i understand what all the excitement is about with siemens CCA tubes being used with Audio Horizon gear.
Sherod hang in there your going to be alright with your upgrade give it some time to work into your system and enjoy the music.