Pretty interesting development...

I head the OR Wifi way back in the day and the thing was incredibly unstable and no sonic wonder over a $40 M-Audio Transit. I've also heard his Tube DAC when he used to attend Headfi meets and it was very underwhelming. He's also one of those proponents that insists WAV sounds better than compressed lossless formats. I'm open to giving these another try, but OR, femto (the fuck?) second clocks, the WAV thing, etc all make my inner skeptic go 

Edit: as for these USB boxes getting out dated, I suppose that would depend if the device manufacturer releases updated drivers for an older box when a newer OS comes out. There's nothing wrong with sticking to an older OS if they don't. But if you're using Macs and your computer dies, you're screwed unless you buy a refurb/older model since you can't roll back OS's if the changes are significant. While I am using W7 currently, I have considered moving to Mac OS down the road for computer audio.

Edit 2: I see he offers 30 day money back guarantee, so I'll give him  for that.

I otherwise would have dismissed this as BS, but after hearing the results (and being an evaluator) of some of MisterRoger's incremental BUF3 mods and tweaks (FIFO boards, dual super-clocks, boutique regulators, receivers, power supplies, etc.), I'm much less skeptical. That being said, there's still voodoo crap out there that doesn't work and stuff that's priced in a way because the MOT's know they can get away with it.

Yeah, I'm skeptical too and want to know what's inside the box. I'd rather buy the base version and play with the "upgrades" myself.

AC images don't work.

What does the Overdrive use as a D/A converter, and what opamp is in the I/V stage?

I asked about the DACs, all I could get is that they aren't R2R. Otherwise, trade secret.

Honestly I don't mean to bag on the guy, but that should be public information. No one is going to rip off his design just knowing the D/A chip. There are some really awful D-S D/As out there.