Originally Posted by derrick14
I have recently just gotten a Shure SE215 and is pondering whether should i get a portable amp as well. I am looking at the Fiio E11 and Fiio E07K but is kinda confused of the differences between them.
Appreciate if the seniors over here can explain the differences as well as if getting the portable amp will improve the sound quality.
Hi Derrick - welcome to Head-Fi
You don't say what your source is - so it's kind of hard to give exact advice. I'll assume it's a portable player.
I've owned almost all of Shures IEM line (315, 425, 535) - but not the 215.
The SE215 is relatively low impedance (20 ohms) and pretty sensitive (107 dB SPL m/W). In laymans terms - they're very easy to drive, and don't need much power to get them to a very high volume. Their impedance and sensitivity specs are actually very close to those on the 425 which I used to own.
So as to your question - no an amp will give you extra volume which you don't need for these headphones. It's not going to increase the SQ. If you hear hissing from your current player, that's another story - then a well designed amp can lower the output impedance and provide better damping (to eliminate hiss). But as you haven't told us what your player is - I can't comment further on that.
With regard to difference between E07K and E11 - one is a portable amp & DAC, the other is a straight amp. As far as suitability for you goes - it is impossible to say until we know what your player is.
But again with these IEMs - you don't really need an amp.