After having HE-6 for 1+ year - they had to go. Have tried them with many stereo amplifiers. Some cheap. Some expensive. Different DACs. Different headphone amplifiers. The journey has been educational - but I finally see that regardless of the DAC / amps chosen - the HE-6 is not for me and longer music sessions. That is OK. LL is always valid.
Logged out of the HE-6.