Before judging the SRH-940 as bad any more, you should seriously try several different sources and amps. When I had the E7 I felt it was making ALL my headphones brighter than they should be. There's some silly people who believe in amp burn-in. I didn't burn it in and I won't go there. I was shocked at how weird it make some of my headphones sound. The E9 + E7 was a double whammy for me and I hated that combo. The E9 itself didn't cause the issue.
I think this is why the E10 + E9 combo should be better for SOME headphones than the E7+E9. E7 + E9 I think would be bad for very bright headphones. Maybe not. Seems to be best for darker headphones IMO.
tdockweiler, I'm looking to purchase a new DAC/AMP combo to replace my UDAC2, which sounds utterly too bright when paired with my SRH940. I was looking at just the Fiio E10, but do you think it will sound better if I add an E9 as well to have a E9+E10 combo? Or do you think the E10 will suffice?
Basically, I know the E10 provides a nice warm and full mid smooth sound as I've already tried it, so what more would I get to add the E9? And If I were to add the E9, how do I connect the E10 to the E9?