OK so here we are on a thread for a DAP, which is by definition a DAC + amp unit with an emphasis on portable use, especially for efficient IEMs and low/medium efficiency headphones - but some of us are ascertaining that it should somehow be on the same level as full-size desktop DACs that cost hundreds or thousands of dollars; or that this DAP is meant for summit-fi desktop rigs. I strongly encourage anybody with these notions to PLEASE use more of a scientific method before making claims like these: make such a comparison and judge with your own ears whether you like a larger or the Onkyo DAC, or compare the stats of each model. I can tell you with utmost certainty that even with my modest $450 DAC setup I'm using now (Modi 2 multibit with two USB components via PC source), that the difference using the same songs, same external amp and same test songs is... substantial, unwavering and unmistakable.
Don't get me wrong, the DAC section of the DP-X1A is fantastic, and to me even much better than than the higher priced Queestyle QP1R and a handful of others I've tried. Even it does at least as good as a PC if not better as a data source in OTG mode, and does sound great, even fantastic with an external amp via analogue out... but that's one of the quirks in this vastly diverse and evolving hobby, is that there's always something better

. Trust me, and ask any of the fellow DAC gurus around, they will all tell you that there
are even better performing DACs than the one that occupies half of the DP-X1A. You even said it yourself, that the configuration of this DAP is more than what
some of those very expensives boxes do, which I do agree with of some of the sub-$200 ones I've tried. But keep in mind:
- Try something for yourself, or at least get cross-checked data from multiple users you can trust... before making claims
- "Implementation is everything". Several examples have surfaced, showing two DACs using the exact same chip can sound completely different, depending on the connecting components
- Full size DAC's can range from around $50 - $35,000 averaging at (perhaps?) $800, where the DAC of this DAP is worth a factor less than the entire unit of around $530
- Many full size DACs use R2R or 'multibit' technology, tubes, large capacitors, sometimes silver wiring, and other components that make them unique from the DAC section of this device
- Full size DAC's are built as the powerhorse to satisfy full-size rigs in hi-res fidelity, including mid and summit-fi upstream amps and headphones that can cost anywhere from... say $200 - $20,000 per example
- DAPs are geared towards the audiophile or 'hi-fi audio enthusiast', delivering enriching sound especially for on the go or smaller size headphones / earphones
I'm by no means an expert on the circuitry / scientific formulas that make a DAC work, though there are a few that approach this level such as
@warrenpchi,
@Stillhart or perhaps
@rosgr63, but I'll assure you that they would all agree there is no point to this argument comparing apples to oranges of entirely different classes, entirely different purposes, and entirely different layouts and prices. I have however, been one of the lucky ones to have been able to try virtually all of the current top summit-fi DACs at various trade shows I've been to, including but not limited to the Yggdrasil, Holo Audio Spring level 3, Hugo 2 and many other low/mid fi DACs which has shown me the difference between DACs can be absolutely staggering and can take good enough upstream gear to staggering heights. You can see from the last two points that this argument is, by definition unfair and is comparing apples to oranges.
I'll admit it was one of my earlier comments that got this topic started, when really I should have just said that the DAP is not meant as a replacement for a standalone DAC.