Just dropped a new set of these into my CJ CAV50 and though they haven't really had a chance to run in and settle fully yet, initial impressions are positive. Compared to the EH EL34s I was using, they are extremely quiet, with minimal tube rush, and seem to have a bit more bottom end and a touch of recess in the midrange. Can't quite sort out the highs yet (they sound fine initially) but will listen extensively over the weekend when I will have a chance to crank the volume a bit, and comment again later. They are nicely built and the pins are the correct size; all internals seem to be rugged and all joints and connections look solid and tight. Also, they did bias a bit lower than the EL34s (had to turn the bias pots counterclockwise about an 1/8 of a turn for each tube), but this was expected. Purchased them from Tube Depot as a matched quad, my long time favorite place to purchase new tubes.
