Audio Horizons TP 2.0 Preamplifier

I have high hopes, Bill. At this juncture, I'm kinda sorta missing my old TP 2.0n.

Gammajo thanks for the input on my pinging or i should say microphoning. Will try what you mentioned. Did you mean lifting the pcb that the tubes mount to? Going to play with it tonight.
The 2.1 with cca tubes makes this already fine preamp a killer preamp. And i am not even using the balanced inputs. Do you guys have balanced units. If so whats your thoughts.
The pinging is bothersome only when changing lps. I just might blow off dealing with pinging tonight and just relax and play some good old classic rock and roll.
thanks again Gammajo

Microphony is typical of Siemens CCa tubes. They tend to be right on the edge of microphonic...or over the edge, which is what gives them their magical space and "air" (same goes for Amperex 6922 Pinch Waist tubes).

An 80 hour "break-in" for CCa tubes is nonsense, IMO. They were manufactured to high tolerances, and should perform at their best right out of the box, and for thousands and thousands of hours after.

Stltrains,
Regarding the pinging sound on one of your channels, I'm guessing that one of your new Cca tubes is microphonic. The 6922( E88cc) family, particularly NOS vintage ones were notorious for being microphonic. You might consider contacting the person you bought it from to see if he will exchange the bad one for you, unless they are a perfectly matched pair. Then you'll need to exchange with him the matched pair. Before you do that, however, exchange the tubes from left to right to see if the "pinging" sound moves to the other channel. If it does, then you definitely have a bad tube. If the pinging remains in the same channel after reversing the tubes, then you have another issue to problem solve for. I'm glad to hear that you are enjoying your preamp with the new Cca tubes. If the tubes are really NOS, then they should get even better after about 100 hours. Have fun.

Andrewdoan,
I'm sorry that no one has answered your request, so I'm assuming that nobody has had the chance to compare the Rogue with the TP 2.1n. As you know, Audio Horizons offers a trial and money-back guarantee. From a few previous posts there is some confusion as to the adequate time allowed in this trial to fully evaluate the preamp, however, most of the current owners seem to have kept their preamps while making up their minds before the 10 days ended. If you have or can get a Rogue unit for evaluation, I would suggest that you time it to get both the TP 2.1n preamp in at the same time of the Rogue unit and do a fun comparison of both in your system to make up your mind of which you like better. Maybe, someone will still chime in yet to give you their personal opinion of each.