A:AnswerIn order to fully hear high res tracks you need both a high res audio track and high res certified headphones but Apple doesnt even list the specs so it's more than likely that these are not even high res. You can however buy good high res headphones for less or even just go wired.These will not get Bluetooth high res as these do not come with high res codecs like other cans do. Some phones do have built in amps like the LG v series that can handle higher impedance headphones. I suspect you would need 2 cords and a DAC amp like the fiio for other phones and all those connections would lower quality. Also to note, despite the apps stating they will offer high res tracks, most cap it for phone listening at 24bit 48khz aka cd quality and do not support external dacs. I have a phone with a built in internal DAC w 320khz max but they don't even recognize that via music apps and use my phone DAC instead do biggest benefit is louder volume when DAC is on.Only way around phone DAC is using a stream service that allows external music players like Tidal does. Spotify doesn't allow that nor does Amazon music.
