Well, first the bad news: the UHA-6 and UHA-6S amps are officially discontinued. And now the good news: the "Mark II" replacement model is not far behind. I've had so much interest in the UHA-6S recently that I decided to give the design a few improvements. The UHA-6S.MKII will feature a smaller case, lower output noise, and an additional digital input (coax S/PDIF). Like the previous version, the Mark II will be iPad-compatible.
With the last few design tweaks just about finished, the new UHA-6S.MKII should be going into production soon. I'll have more updates as the release date approaches.