Originally Posted by miceblue
The E12's treble is a little less fatiguing in this sense compared to the C5 as it has the house FiiO sound of warm mids and an easy treble. On the other hand the E12's upper-midrange is bright to my ears compared to both the O2 and the C5.
Thanks for explaining that. Maybe luisdent has a point that it could be more noticeable with a flat amp if people with flat headphones are used to a "warm" amp. (if I paraphrased correctly)
I'll find out soon enough. I called JDS Labs for the first time and I was very impressed with how friendly and helpful John was. He offered to accommodate me with two customizations, so with that and what I've read, plus my three bugs* for the E12, I placed an order and it SHIPPED THE SAME DAY! I still have to like the sound, but at this point I'm leaning _heavily_ toward the C5 backed by a very responsive and "local" company.
*must turn volume to power off, bass boost is too much for me, crossfeed is too much for me to be useful