As much as I like the digital volume control on C5 I do like a large volume knob. I dont listen to music that low and I never had balance problem with any of my amp.
As far as the gain goes I was wondering would it be possible to have a three gains setting progammed on C5?
But that is precisely why I like the C5, hahaha. It has a very pocket-friendly interface. The important things are where they should be, in my opinion. One improvement I have for the C5 is that the potentiometer stick out a little more since I find it hard to adjust in my pocket sometimes (or maybe it's just due to my long fingernails....). Once I do get access to the potentiometer on the other hand, volume and gain adjustments are really smooth.
And to bring this up again, another improvement would be a gain toggle LED indicator.
I think it would be possible, but the gain is not changeable I believe. There would just be some added programming logic such as setting a gain integer (1, 2, or 3) for the different gain toggles.
That being said, I still haven't gotten the drivers on Windows nor Mac to work with the SparkFun pocket AVR programmer.
As for volume control, yes I too like the larger volume knobs, but I still have channel imbalance problems with the O2 even with 1.0x gain on the fairly insensitive K 701's. I'm listening to some music at the moment and the volume knob on the O2 is at the ~7 'oclock position, which is plenty loud (maybe too loud) for me. Yes, this is in the channel imbalance region, and yes this is one of the many reasons why I prefer the C5 for quiet home listening.
Edited by miceblue - 4/7/13 at 10:00pm