This isn't intended as a review, but as the start of an Objective 2 appreciation thread. I've had the Objective 2 + ODAC Combo for a couple weeks now and I absolutely love it. I may be late to the party, but I believe there are at least hundreds of other O2 owners out there that probably appreciate their amp as much as I do. Please share your thoughts AND PICTURES! I've only tried a handful of amps, starting with the Bithead years ago. I don't think it's necessary to compare this with other amps to know how good it is. It sounds great! I first tried it with the Sennheiser HD700, which I really liked. Then I got the HD800 (still can't believe how much I spent) and now it all just sounds so perfect!! Perfectly clear. Just really perfect music! The Objective 2 is very clean and detailed, which is what I want from my amp. I get all the bass I need from my headphones. And if I need more, I can boost with EQ. This O2+ODAC is from JDS Labs and I can't say enough about how great my experience has been. John Seaber is incredibly responsive and accommodating. And their products are top notch. I was pleasantly surprised that I was able to place an order in the afternoon, including customization and two laser engravings and it still shipped the same day! The O2+ODAC works easily with both the Mac (and I'm sure PC) and the iPhone and iPad. I prefer the software and convenience with my iPhone, still processing the crossfeed digitally before going to the ODAC. The only way I was able to connect my iPhone's digital output to the ODAC without an error message was to connect through the Lightning Camera Connection Kit to an AC powered USB hub and then from the hub to the ODAC. John Seaber had success with a USB-powered hub, so you may get lucky trying that. The Objective 2 is designed to be neutral, so with the worst of the reviews complaining that it's too neutral and lacking bass punch, I'd say the amp is success! And the price is right. So kudos to the designer, NwAvGuy. I've read so many positive comments all over the web on the Objective 2, so I was surprised that nobody here has yet started an appreciation thread. Please comment on your experiences with the Objective 2 and O2+ODAC. And post photos of your O2 engraved. Here is a photo of mine with a sentimental engraving of a show I used to watch as a kid of a "mop-topped boy band that would just fade away." Tonight is the 50th anniversary of their first appearance on Ed Sullivan.