HiFiMAN EF100 Headphone Amplifier & DAC @ techPowerUp
 

HiFiMAN has a reputation for producing great headphone amplifiers. Today, we take a look at their newest do-it-all headphone amplifier & DAC combo with an on-board T-amp. This all-encompassing device features a class A/B headphone amplifier with a tube input stage. Despite all its features, it sells for $499, which is quite impressive.

http://www.techpowerup.com/reviews/HiFiMAN/EF100/