I have to agree with you on the UHA and I am 100% satisfied with it. Nick is also a great guy and been so patient with me asking so many questions as I am experiencing the dc offsets from lod output. I don't know how he designed the amp, it's amazing tho it has NO dc blocking caps but it has no trouble handling the 1.5 volts and then kill it completely at output to phones.
Honestly I am still shocked by the latest results - the most neutral/transparent/cleanest/detailed/effortless sound with the kind of sound stage I have never experienced before. I don't use the hi-gain setting before (due to loss of details and clarity to my ears) but now I really enjoy it if I want to use it.
If I can't find another amp with similar design (no DC blocking caps but can take it and then kill it at output), I may end up with having another UHA for backup. Let me know if you guys know any other amps with similar design.
Unless I'm mistaken "no DC blocking caps but can take it and then kill it at output" means placing output caps at the end of the amp signal chain. Amp designers will try to avoid because technically means a less 'pure' signal, making it more difficult to market, regardless of whether the differences are audible or not.
Essentially avoiding placing output caps in an amp is the same reasoning behind removing the output caps of a dac, like in your diymod...