O2 design? Well it's quite good, BUT I don't think he achieved his design goal of "One size fits all" for various reasons:
For portable use:
- Too loud for (C)IEMs
- Channel imbalance at low volumes ( again for (C)IEMs )
- On/Off click is IMO not acceptable when used with (C)IEMs
- Way too big to be portable
- No charge/battery indicator. (How would I know when the batteries will suddenly go dead? I mean this IS suppose to be portable....)
For home use:
- No 6.3mm socket (some headphones need that and a 6.3 -> 3.5 is horrible interms of connector strain)
- No RCA inputs (most home rig would use that)
- IMO not very aesthetically pleasing (Which IS a criteria for me if I were to look for a desktop amp)
Overall, I'd say it's electronically practical but consumer-wise, not so much.
That's why people do projects in groups, not individuels.
Look at P-H for example, I'm only doing the electronic part which I'm good at, bowei did the management, and mech did the case design.
Edited by akiroz - 4/2/13 at 3:34am