Have Jeff Rowland Concentra II am I crazy...

Was thinking of using it as a preamp, Getting the Mcintosh 2102 or Vtl st150 amps. To bring that tube sound to Sonus Farber Grand pianos. Thanks for your toughts
I had amazing synergy with the Cary SLP98 and Tubed Mcintosh amp. Was using the MC275 and the Cary just brought it to life, the Audio Research LS25 mk1 with the 6922 tubes also sounded great. Pluck those stock tubes out of the 2102 if you want to get the best out of the Mac. Good luck.