ARC versus Joule Electra

Hi Folks:

I greatly admire Jud Barber's work both in terms of preamp's and power amp's. His OTL creations are finest of that type of tube amp that I have ever listened too.

Has anyone ever done an A-B comparison between the ARC Reference 2 Mk2 or LS 25 MK2 (both 6H30 tubed) versus the best preamps by Mr. Barber?

Best:

D.H.