Originally Posted by digihead
I tried the Klipsch S4 v. the Maximo imtetal IP-HS5 and thought the Maximo walked all over the Klipsch in sound quality. Different strokes for different folks, however I definitely preferred the Maximo's audio quality vs. the thin sound of the Klipsch. I was shocked that I had read so many positive reviews of the S4.
I prefer the iM-590 over the S4 as well, and by a margin at that. I can see why people like the S4 though - it has that bass-heavy, aggressive, slightly distorted, colored sound that many from the Skullcandy generation consider ideal. Different strokes indeed...
As for build quality, the iM-590 has recently been updated with a stronger cord and better 3.5mm plug. Before the update I'd have definitely picked the S4 for build but now the Maximos should at least keep up. The Klipsch does have a thin cord but at least there's no reports of the cord hardening or splitting.