Audiophilepure

http://goo.gl/bsGCP2 Read Here

“Most tube headphone amps aren’t suitable for use with in-ear headphones, which are more sensitive than full-size headphones, so the tubes’ background hiss/noise levels can be audible when playing music with in-ear headphones. ”

http://goo.gl/FwPFpG Read Here

” The Lyr 2, like all Schiit products, is made in California, and the warranty runs 5 years, although the tubes’ warranty is 3 months. Even so, Schiit claims the tubes should deliver up to 5,000 hours of play time; and when they wear out replacement tubes are inexpensive.”