If you just want min/max specs, you can build a Wire SE or BAL for 1/5 of what the HA-1 costs, and it absolutely demolishes the specs of most everything else out there (e.g. 145 db SNR). I am still hopeless when it comes to case work, so I don't have mine fully built yet or boxed up, but I can confirm that the smd work is very easy even though I only have one prior minor smd project under my belt. Supposed to sound pretty damn good too as compared to most other measurement-first amps, if the DIYA guys are to be believed. I gather qusp (a old time HF MOT, who bailed many years back along with many of the other high value posters), unloaded his dynahi after comparing it to his completed Wire. http://www.diyaudio.com/forums/head...igh-performance-headphone-amplifier-pcbs.html Should make for an interesting alternative to my mainline whenever I do eventually find the right precut case to throw the boards and transfo into.