Just ordered a pair of JH 16 Pros, and have started looking into buying a portable amp as well. At the moment it's likely the amp will be driven straight from an iPhone, but I would like to insert it into a home system featuring a Bel Canto C5i, and drive a pair of HD650s when required as well. Furthermore, I'm pretty certain a CLAS -dB is on the horizon, which is why I want the amp to scale up when needed.
Initial research has me extremely confused. I've been looking primarily at the ALO Rx III and Ray Samuels SR-71B. For the former I gather its volume control can be problematic, as there's channel imbalance at lower levels. The idea of a "tubey" amp sits well, but I've read the ALO Continental V2 will have problems with the low impedance of the JH16, though will work well with the HD 650. I gather the National is better in this regard, but with problems driving complex multi-BA IEMs.
Is there an amp that will solve all of my problems? If not, what are the compromises one has to endure?
Since I'm in Sweden, auditioning any of this gear is unlikely, so your opinions about their sound would also be appreciated.