I am glad Guidocorona restarted this thread. I am using a Herron VTSP-3A with my Rowland Model 10 and it is a wonderful match. I have tried a number of preamps with the Model 10 and do not find that balanced vs single ended matters as much as the quality of the preamp. The Herron is single ended, but is dead silent with the Model 10. The detail, transparency, tonal reality, frequency extension, bass, and soundstaging are superb. I have tried a number of highly regarded amps of recent vintage including the new Modright, Ayre, and the newest Spectrons used as monoblocks and none of them measure up to the Rowland Model 10. It is a keeper. The same goes for the Herron preamp.
