How much better does the AK240 sound relative to the iPhone 5S?
I'm currently using the iPhone 5S with the Shure SE846. If there is a big enough difference in sound quality, I might consider buying the AK240.
I have a question for you as I also own an iPhone 5 and a 7th Generation Classic - When adjusting volume, on my iPhone I am close to 75% to get the same volume as my classic is at 40% - I don't have any kind of limiter on - no sound check, just the Classic is a lot louder (and actually sounds better)
Is this what you experience?
Interesting - with any of my headphones, to achieve an equal volume I have to turn up the iPhone a lot higher.