I just had my first long listening session with the Jolid 502A. I'm sure the neighbors are annoyed! The KT-88 tubes are awesome. The EL-34's of the 302A's may have a little more detail but the output of the KT-88's makes up for it. So far my favorite disc's are Jimmy Smith "Root Down" which is a B3 organ disc and Shaun Mullens "Souls Core" CD courtesy of Hoosier (russ A)! It is a little mellow for my liking in general but the tube amps and srs-sda's really make it come alive!!! It has become one of my favorites at this point. Between the two disc's I just got done with over 90 minutes of heaven! After that was some Cheryl Crow and that was no disappointment either. I wish I would have known about this tube stuff 20 years ago. So many sounds that I never heard with my Carvers, Soundcraftsmen's or sunfire amp.