Hmmm -- glad you like it. You've caused a problem for me though, as I was thinking of getting a FiiO X3 and may have to consider an iPod Touch...which goes against every fiber of my being.
So, any chance you could give a brief description of the before & after sound signature of the 535 to us?
Why? Do you hate Apple's product?
This Audyssey app is really good, I mean seriously, this is not a gimmick. Don't be fooled by the $0.99 price tag. Find someone with an iOS device, pay him/her a dollar to download this app and test it with your headphone (make sure it is supported). Like I said earlier, the sound is a night and day difference, not a placebo effect.
I believe this is a software DSP that calibrates the headphone according to their profile, it's not just a simple equalizer. I have an equalizer, it doesn't sound even close to this good. You can easily do an A/B test with this app by turning it on or off. With this on, the sound is cleaner, everything sounds 'tighter' with more clarity. The horrible horn-sounding mid is gone, bass is tight and audible, and best of all no treble rolled off here! It may even make the 535 sounds too bright (!!!), but you can use the high/low slider to warm the sound. The high/low is basically warm/cool adjustment to suit your taste, but I find it perfect at neutral. There is also the usual bass/treble setting, which is good for adding an extra bass to the 535. Now, here's the con of this app: you will not be able to use the Shure 535 again without it. When I turned off the calibration, it was shocking! I can't believe the 535 can sound so bad, it's like listening to AM radio. The sound is noisy, and music is just 'dirty' and 'messy', that's the best I can describe it. Don't just take my word for it, you need to try it yourself. I think all 535 users with an iOS devices should do themselves a favour by downloading this app, it's the best one dollar you can spend! I don't think even a $1000 amp can make your 535 should this good.
Edited by pianissimos - 9/3/13 at 1:36am