Info from those familiar with Audio Research
I'm interested in a used Audio Research preamp for a couple of reasons. One is their longstanding reputation for musically satisfying products, the other is the number of features they offer which are important to me. So I have a couple of general questions:
1. Newer models incorporate the 6H30 tube. I have no experience with it but I've read suggestions it may sound more "neutral" or even solid state-like than earlier models utilizing 12AX7 tubes which may have a warmer or more full-bodied sound. Can you comment on the overall sonics of each series?
2. Vinyl playback remains important to me so are any models, more recent than the SP-10, noted for their phono section more than others?
Thanks for any guidance.