I suppose a few years ago it would have been JEM. Anyway has anyone tried one of these? I know my hearing is not the best but to my ears this is the best thing I've heard in a long while. 50 Watts in a box 5" x 4" x 3"into a 4 Ohm speaker, and as clean as you like. Class D amp with this "NUTUBE" preamp which is basically a valve the size of an LED. I went to a jam session last night took this with me and a 10" Eminence Ragin Cajun speaker 8 Ohm so it was working on 25 Watts and on less than 1/2 volume it was every bit a match for the other guitarists, especially the bass player who was a bit loud to say the least. Imagine what two of these would be like! There are three amps in the series, Clean (which I have,) based on American amps amps. AC based on the British amps and Rock, based I believe based on the Marshall amps. Anyway here's all the info.
http://voxamps.com/MV50


