With the Alphas on my DT770 600 ohm, the treble a lot more harsh. The sub bass and impact increase a very good amount, as you would probably imagine. There's even a little bass at the lower side of the mids, but at the same time the mids don't seem as close to you. I think it's because the driver is quite a bit farther from your head than they are with the stockers on.
Putting on the Alphas makes both my D2000 and my DT770 a little more V-shaped sounding. I think the Alphas almost make the sub bass on the DT770 almost as thunderous as on the D2K with the Alphas, ALMOST. The D2K reaches just a little bit lower, but this may not be the case with the 80 ohm version of the 770. I think esmBOS is going to have to leave his impressions of the changes they bring to his 80 ohm after he receives his Alphas. (I'm assuming you actually ordered them Haha)
I think I'm going to keep the Alphas on my D2K though, I'm kind of liking my mids on the DT770 right now. When I want a load of bass dumped on me, I'll just listen to the D2K.
Edited by cCasper TFG - 2/8/14 at 11:49am