I received U3 for testing yesterday. Initial impressions are very positive. Very revealing and transparent sound. What I wish is maybe slightly more forgiving top end. It's very revealing at the moment, I'm not sure if it gets smoother while burn in. I guess the unit which I got is brand new.
I have one question. I use the device with Naim DAC and I have Naim DC1 digital cable (BNC-BNC). So naturally I want to use BNC input on Naim DAC. Now I have a simple BNC female to RCA male adapter which I use with U3 RCA output. Is this solution better than to buy AES to BNC adapter? They're quite expensive, for example a Neutrik one costs almost $50.
I also have Audio GD DI-DSP at the moment but it's suffering of driver issues on win7 64bit. I hope they get it fixed soon.
BNC to RCA cable would be good. The signal may degrade when used with a transformer.