The JA-30 tube monoblocks has always been a very special pair of amps for us. Rated at 30W Class A, they are simply impossible to break away from once you have them powered up and playing. They have an amazing amount of bass, a very richly textured mid-range and smooth highs that will bring about a magical experience when you listen to them. Vocals were particularly holographic with a 3D like imaging. The amps are self-biasing (but must use a match pair) so it is almost like plug in and play. Very smooth and easy. This is the MK I and the difference between this and the MK II is that the MK II can run on KT-150 tubes for a slight increase in power output.
The pair you see here were former dealer demos. They are in terrific shape with very minor scuff marks. We have the original boxes.