Well, this is embarrassing. I have a bit of a specialized PC case where all the connections exit out of the top of the case under a removable cover. And it doesn't play nicely with the breakout cable of the [email protected] AT ALL. So the ESI [email protected] needs a new home despite having less than 2 weeks use on it. I am selling it for exactly the same price I paid for it 2 weeks ago which is $279. This includes shipping and Paypal fees. I can tell you that in the short time I used it I noticed a definite improvement with Modi Multibit but no real difference to speak of with the PWD mkii DAC so ymmv. Let me know if you have any questions.