Heard the Auteur (stock pads and CC cable) yesterday at
@Cat Whisperer Bob 's home.
First with a Liquid Platinum w/ Amperex Bugle Boys (and Musician Pegasus w/ both amps) vs. my HD-600. Summary: It's like the 600's had 20% infusion of an LCD-4 (OG). Denser lower reaching bass, and a relaxed upper mid range/lower treble. I didn't listen to anything with an annoying treble, but quite sure the Auteur would have won that easily. Bigger stage - esp horizontal, and far better definition. I concentrated on Norah Jones first LP which is clean and not bright, and that was a clear win on all fronts for the Auteur.
Then vs his HFM Stealth and my HE-6 SE on his Aune S-17 Pro (which I hadn't heard before). On most cuts - esp several on Little Feat's "Waiting for Columbus" the Auteur made the HFM's sound thin with a recessed midrange that was also lacking definition/focus/depth! It went that way with most cuts, although not as pronounced and the Stealth topped it w/ a few cuts that called for big soundstage and transparency, the 6 SE had better bass impact that was noted a few times, and probably had the lowest distortion/cleanest sound, but just was a bit wan overall vs the other two. Both HFM's did a bit better with Patricia Barber's "Cafe Blue", which was interesting.
Side note on Aune heat concerns: My tastes in volume are lowish by todays standards - (no non bass peaks over 90 db) was primarily set to 24 for ZMF, 30 for Stealth, and 47 for HE-6 SE and it did get a mite hot with the 6 SE. Looking at an internal pic, ventilation holes (or more heat sinking at the front and back plane) might be useful, or a internal fan or external fan pointed at one of the rear ventilation holes - because turning the output down when it senses it's too hot is frustrating to a user, and if the sensor ever gives while over driving it you'll get Aune flambe', which would suck in every way. I woudn't hook up a pair of Maggies to it for sure.
Have to get the ZMF up here before the tulips bloom to see how it fares in my set-up. As many before have discovered, it's a pretty damn fine headphone.