HenKiHonestly, while the S7 Edge does sound decent, it really doesn't make best use of the quality of the Primo 8. Though, I won't lie, there are other IEMs that perform just as good or better around the same price. Get yourself a decent DAC+Amp and it should help these shine much nicer.
I'm no longer in the market range that these fall in, as I deal with TOTL IEMs, but I did debate about going with these back a couple years ago.
HenKiMy dude, the Samsung S7 edge does not put out enough power to drive the headphones that well. While they are small, these are not the low impedance earbuds that you can buy at Walmart. These have a higher impedance and do require a DAC/AMP to truly perform. I'm pairing these with a Dragonfly DAC at work and a Denon DA10 when roaming, and these little IEMs sound great, I have no issues.
HenKiThe ZuperDAC is a good budget unit that will definitely enhance the quality of these Items. You could also check out FiiO if you want options for sub $100 DAC/amp. Higher quality, but a bit more pricey is the Xduoo XD05 which is an absolute beast for its price.
HenKiI'd suggest you to buy a cheap but good DAP, rather than buying a half baked DAC/AMP. Shanling m1, Cayin N3 to name a few.
If your budget allows, buy Opus#1 or Fiio X5iii for midrange DAP, or Chord Mojo or Oppo HA-2SE for midrange DAC/AMP.
jumoonjiThank you all for your recommendations but I'm looking for portabel DAP/DAC for my Samsung s7 edge so it need to be mobile, not needed for home use
HenKiAll the above DAP I recommended above are portable, because they have a small footprint. Even more so with the Shanling M1, as the size is similar to the old iPod nano (the rectangle one).
If you want to go mobile, my recommendation is that don't buy a dedicated dac/amp because in the end you would need to do stacking with your Samsung. Or maybe you could try to see the review for dragonfly. The shape is like an usb, but still you'd have to manage with extra cable hanging out from your power jack.
In any event, the Cayin N3 and the Fiio X5iii can act as a dedicated dac/amp, so you can connect it to your pc/mac should you have the need someday.
HenKiThere's quite a large selection of portable gear. Many of which have been stated. My favorite USB DAC+Amp that is low priced and portable is the DragonFly. It has several ranges within its lineup, so check to see which one you would like more. When I demoed it years ago, it sounded awesome for the price and definitely an ear opener.
For DAPs, I personally use the Questyle QP1R but most likely FAR from your price range and I would recommend something like the FiiO X5iii, Opus #1, or something within those price ranges. They are excellent pieces of equipment. I would recommend looking on Head-Fi for more choices if anything.
As for which is cheaper, I would say the DragonFly. But you might see more performance from going with a DAP. Most cases though, you'll be fine with the DragonFly and it has the bonus of being able to be used for both your phone and computers.
HenKiBefore you get a DAC just to compliment Primo 8, please go try something like Westone W40 , um pro 30, or Hem 8 or something else that fits you. Unpopular opinion here but there is a reason why it had such a short product life.