The Audio Horizons TP 2.0 is a 6922 tube based preamp. There are a number of threads here in the forum in which its qualities are discussed. I have found it to be an excellent preamp in my system (VTL MB185 Signature monoblocks; Coincident Tech Super Eclipse Mk III loudspeakers). Perhaps most important for your purpose, it is available for a 30 day trial in your system.
I use the TP 2.0nB version with Siemens tubes.
I use the TP 2.0nB version with Siemens tubes.