I would say, that a "balanced output" is not really necessary for the DM6 (for the reasons I've mentioned) as well. The purpose of the balanced output on most DAPs is to basically reduce/eliminate the stereo crosswalk, and to give more juice to harder-to-drive headphones. No other benefits. It actually should introduce more noise, because there are more "audio paths", meaning more noise is picked up. That's why if you check most DAPs, you will see the noise floor (SNR) of the Single end output much better than the balanced one, because 2 separate paths (especially with DAPs that have dual DAC/AMPs for the two channels) basically means 2x the noise. (Ref - Hiby R6 Pro)
So, you will be getting way better sound when it comes to noise from single end, and better channel separation (stereo crosswalk) with balanced. And the "balanced" with DAPs and earphones shouldn't be confused with "actual balanced", when it comes to XLR/studio "balanced". That "balanced" is completely different in most cases, because it's actual goal is to eliminate noise from source/cables, but that includes additional hardware on both ends (the source and the speakers). Some more expensive DAPs's balanced output might actually have the hardware on the source side, (meaning actual balanced, aka having 3 output per channel, where one is the mass, the second is the signal with positive polarity, and the third is flipped polarity/phase and then through hardware they get combined, and the leftover signal, which would be the noise, gets "cancelled" - basically - noise cancellation), but most DAPs/AMPs (like the Hiby R6 Pro, based from what I saw on their specifications) do not.
And, if you happen to be using your phone's output/jack (and most phones have bad noise floors and crosstalk, basically why DAPs exist, because of the signal-to-noise ratio, and the crosstalk), going into an AMP, you will simply amplify the not so ideal noise from the phone even more, on top of the noise introduced from the additional gear. Basically, you are degrading your signal even more. You might think that it might sound "punchier" with the amp, but that's because amps (and their flilters) often act like EQ, boosting midbass, and some other coloration.
And about the crosstalk, you wouldn't get benefit from that either, because the phone already had channel leakage at it's internals, before reaching the AMP.
(DISCLAIMER: I might not be 100% correct on the deep technical stuff, but that's because I wanted to try to explain things as simple as possible. There is a language barrier as well, so, I apologize if sometimes I am hard to follow, or my terms are incorrect. English is not my native language.)
[EDIT:] I apologize to you, Yell0wBee, for some how missing the fact that you use a dongle. Most of what I've written shouldn't apply to you, but I would assume that the AMP you're using might not be very clean. Can't help you any more than that.
Also, my post was aimed more towards some people, which I noticed they were using a DAP, on the end of which they have an additional AMP attached. That's um... yeah. Overkill would be the most gentle way to put it, especially for the DM6.
Thanks for all that info, I’m sure some will get help out of it.
