Just an update on some different amps and sources with the HE-6.
The EF5, like the WA22 drives the HE-6 just adequately (hence the EF6 project). The HE-6 gains a bit of an edge while losing some dynamics and becoming more mid-centric than with the WA22 but the basic problem is the same, no headroom.
With the EF5 more than the WA22 the low end of the HE-6 is without reinforcement. These headphones even sounded decent out of my HA5000, but clearly scream for some real juice to get their membranes or whatever fully accelerating.
I played with a few sources by switching around DACs with the EF5, and could clearly hear the difference. The Devilsound V2 revealed the inadequacies of the Hot Audio DAC WOW and while it could keep up with the EF5, the Bel Canto DAC2 seemed to surpass it and was more in the HE-6's league.
Sadly I do not have an amp to try that is in the HE-6's league until I have a speaker terminal adapter to use.
Edited by grokit - 11/18/10 at 1:23am