Apogee Groove improves headphone audio, if you're willing to pay up
 

It's been awhile since I've spent much time with Apogee's audio gear. In my early Engadget days, I reviewed both the Jam and MiC, two portable recording accessories that turned the iPad into a tracking center for guitars, vocals and podcasts. Earlier...

http://www.engadget.com/2015/06/09/a...=rss_truncated