I dont know why anybody would switch from a V20 to a dedicated DAP, the difference in sound quality between a V20 and a DAP are pretty much non-existant for people with normal hearing, I had an Onkyo DP-X1 and tested more expensive DAPs from A&K and couldnt hear any difference with the n5005 and carrying around an extra 500 grams is just not worth it compared to having everything on my smartphone - maybe the stronger AMP and the ability of some DAPs to use 2 SD cardscould convince me but other than that.. Ordered the cables for the High Gain Adapter trick for the V20 now if that solves my volume issues I'll be perfectly happy with my new setup : )
I agree with many of the previous responses regarding the difference in using a smartphone such as the excellent LG V20/V30 vs. a dedicated DAP. (Battery life, distractions, more potential storage space for music files, less RF & EMI interference, all power of the battery is dedicated to driving the DAC & Amp in the DAP and not to all of the other sensors and background processes in a smartphone, etc.).
But IMO, A LOT of the difference really depends on what type of music you listen to regularly, and ultimately, how well it was recorded. After the prerequisite of a great performance, the quality of the recording is EVERYTHING.
In fact, on some music that you may really love because of nostalgia, etc, you might find that a more revealing DAC, amp or DAP allows you to hear more of the shortcomings of the recording, which might ultimately detract from your enjoyment.
So in that sense, many common, popular music recordings may actually sound slightly worse on a high-end setup, or perhaps not much different because the recording may not be that revealing of fine details or nuances. So then you might understand why many people prefer a setup that provides a "smoother" or "warmer" presentation. Everything just sounds "good" and enjoyable, and as long as your foot is tapping, it doesn't matter, that's the goal.
So overall, depending on the music you listen to, you might not hear much if any difference between a really high-end setup and a "very good" setup. BUT, with
some recordings, you may experience a very noticeable improvement in SQ.
I'm also a musician (drums/percussion & saxophones), and have played live in all types of venues with all different varieties of musicians of both acoustic & electronic instruments.
With that type of experience, you really become discerning and critical of recordings where the instruments actually sound realistic and life-like, and even more so, it's incredible when the environment or "room" that they were recorded in also sounds real.
Just as a basic example, as a musician you are
constantly listening to your own instrument and to those of your bandmates just to make sure all of your instruments are "in tune" and not flat or sharp. Just that simple skill develops critical listening and attention to the complex harmonics of some instruments.
So IME, when you have an incredibly accurate speaker system, or headphones, or IEMs...having a better DAC, amp or DAP can reveal nuances that lesser devices cannot reproduce,
if those nuances are accurately captured in the recording.
So what I'm trying to say is...if you normally listen to music that is recorded good, but not great, that in itself will limit the differences you might hear between device "A" and device "B", simply because there is nothing more there to resolve. A mediocre recording is going to sound mediocre on both devices.
There is also the consideration of the state of mind you are in while listening. When using a smartphone or a DAP "on the go", you often aren't really relaxed and truly in a state of mind to completely stop what you are doing, sit down, and truly listen and
concentrate on the music and the fine details. Sure, that isn't always 100% true, but DAPs and smartphones are typically used in more "active" environments, where there will most likely be some type of distraction.
But for some people, a high-end DAP might serve as both a "on the go" music device, AND their main source for critical listening while at home. For those people, the potential benefits of a dedicated, high-quality DAP may be worth the extra expense and "trouble".
Luckily, the N5005 is extremely revealing of all of the fine detail and nuances captured in great recordings.