I'm going to buy AKG K550 and I want to know if there is any need to buy a Fiio for listening to music with MacBook Pro and iPod!?!?
Is the difference in sound quality or sound volume? And HOW MUCH difference?!
Is Fiio e5 good?
A FiiO E10 (using it's DAC & Amp) will improve audio quality for using headphones with the Macbook
A FiiO E07K could be used with the Macbook (DAC/Amp) and with the iPod (amp only).
Maybe get the K550s first, see how will the K550 works directly with each device, then think about about getting a amp or DAC/Amp.