Nice...An AE-1 amp love thread...Count me in,too.
Mine has or is into about 250+ hours of use,and I'm extremely pleased with the sound and the performance. And yes,I agree,the battery capacity is outstanding.
My AE spent the first 97% of it's first full charge (90% of it's second) driving my Sennheiser 590's maxed out through a DAP source. Another 30+ hours of lighter duty through Shure E5's.
Justin at Headamp will shortly get another order for an AE-1 configured as he tweaked mine -for a friend who has heard it through a Zen Micro>Cardas mini-mini>AE-1>Shure E5's. An excellent synergy among the listed components.
And yes,I agree that burn-in can certainly help with some electronics. I've built and tweaked a couple of high-end water cooled PC's,and can index a couple of rather dry white papers regarding electron migration,leakage,and bedding,ad-nauseum....Anyway,there (computer CPU and GPU,etc.),and here,it does seem to work.
I'm likin' my AE-1 alot....Kudu's to Headamp,and to Justin Wilson on AE-1 #037.