Philip:
Probably best to call Bill Baker at Response Audio or Joe Jurzec at Jamn Audio outside of Chicago, the two men responsible for the design and production of that series of Purity Audio preamps. The circuit is the same; only a few parts are of different grade and materials. I am extremely busy now at work, but if still interested after discussing with them, I will pass on my phone number. Not sure how to do personal email on this new system- I did try.
Probably best to call Bill Baker at Response Audio or Joe Jurzec at Jamn Audio outside of Chicago, the two men responsible for the design and production of that series of Purity Audio preamps. The circuit is the same; only a few parts are of different grade and materials. I am extremely busy now at work, but if still interested after discussing with them, I will pass on my phone number. Not sure how to do personal email on this new system- I did try.