I am very new to the world of audiophiles, so please excuse me from any obvious facts that many may already know.
I'm trying to buy a portable DAC/amp that would work well with my Sennheiser HD650 and for my smartphone Galaxy S3 LTE.
I'm wondering what is the point of a portable DAC/amp if you are gonna be using a slightly over-average IEM's or portable headhphones?
From what I've researched online, the portable DAC/amps make a little difference in the sound quality of most IEM's.
So wouldn't the portable DAC/amps have any value? Most likely I'm missing something here.
Putting that in mind, just what kind of earphones or headphones do I need in order to make full use of portable DAC/amps? I think many of us would agree that carrying a HD650 out to work or school wouldn't be too practical.
Thank you for reading and I will appreciate all the answers you give me.
Many more IEMs are now using multiple-balanced armature drivers which require a device with a low output impedance. For a long while many DAPs (iDevices and such) didn't have a low output impedance so an amp was necessary. Also there were situations such as when I owned TF10s I did find my old iPod had trouble driving them well enough to deliver deep bass on some tracks.
With dynamic driver IEMs I've found an amp can do a better job than my iPhone 5 does. I tend to own expensive IEMs however! When I use my less expensive Sony XBA-3s I just use them with my iPhone by itself as it works fine with them. I think most devices have caught up and will do a decent job with most IEMs, but I've seen posts from people who own some Android phones that have horrid sound quality (though I can't tell you about Samsung as I don't own one). They tend to either buy a separate DAP/iPod or some kind of portable DAC/amp to use in those cases.
Other than all that, choosing a pair of IEMs or headphones that suits your musical tastes is more important than the rest of the gear IMO.
Thank you very much for your answer. Thanks to your response, I have developed an understanding of the practicality of the portable DAC/amps. I will have a look at some IEM's on this website that would suit my needs.