So here's my question. As someone who's completely been ruined by the Yggy, how Sigma-Delta-y does this sound? How does it compare against the Geek Out (v2 preferable)?

I'm quite tempted to get a full-time device like this.

I don't own the Geek Out. But I've been using R2R (is that what you mean by 'Sigma-Delty') DACs for years. AK Jr isn't like them at all. It's strictly neutral with a slight bit more distortion than I expected, but still very low considering. I am willing to put my money and mouth behind it as a quality source.

So here's my question. As someone who's completely been ruined by the Yggy, how Sigma-Delta-y does this sound? How does it compare against the Geek Out (v2 preferable)?

I'm quite tempted to get a full-time device like this.

I have no experience with Geek Out series but I also think it's apple vs oranges.

Firstly I think we need to figure out if the "Line Out" function in the menu really bypass the onboard amp - and to my ears it does (feeding Rx). Not a big difference, but I think I when I hot switch to line out, maybe I heard a tad more volume, a bit more clarity, and a bit more soundstage.

Secondly, when the line out is on, while you adjust the volume, and there is a line out option on the upper-right corner of the screen, and I don't think switching that on/off makes a difference.

Thirdly, I played around 70~72 volume to compare with 75 maxed out, and I don't really feel the measured data is translated into audiable difference. I also assume nobody is gonna listen straight out of the Jr with 75.

The ΔΣ sound ... I'm not technically proficient, but I assume aside from Yggdrasil and Amstrong 200, every other source I've heard are ΔΣ? If that is the case, Jr is comparably more neutral than most of stuff I've heard. It doesn't have very notable glaring problem (probably because no Sabre chip). As I've noted in the main post, it can sound a touch bright but mostly neutral. It also has a little of grain, but nowhere making me insane.

Being portable to me is ultimately a compromise, and Jr does a good portable job. I'm not sure if it sonically comes close to the holy portable grail on CS (GO-Leck), but in terms of size and convenience Jr wins hands down for me.

Yeah it's tough all the good uis app uis don't support flac/high rez/or USB out the once that do aren't that much better than the audiophile daps.  Then you have to deal with apples fixed storage its a headache.

Yeah, fixed storage is fine when it's just that thing you don't want to be messing with, but with huge FLAC files and libraries, it's starts to get a bit out of control.

Is there a good FLAC player for the iPhone? The new iPod Touch is 128gb.

With the $9.99 upgrade (an in-app purchase), Onkyo HF Player supports FLAC (and ALAC) up to 192/24.

Yeah, this has got my attention. I'd be happier if the new iPod Touch was 256k, or had a micro SD slot, but with WiFi and Bluetooth and the best portable-player UI ever, my AK Jr. may be for sale tomorrow.