4.What's the difference between the E12DIY and the E12?

A: The E12DIY is positioned as a portable headphone amp that conveniences DIYing by end users, and comes with several opamp and buffer chips to choose from (to be exchanged on the E12DIY motherboard by the end user).  It has roughly the same output power as the E12 (with some difference depending on chips used).  Sound character will change depending on chips used;  bass and crossfeed switches are not available on the E12DIY.  The E12DIY is targeted for high-end audiophiles and DIY lovers.