Summary: I had the old Klipsch S3 for about a year and a half now and I decided to get an upgrade recently. These S4 ii definitely outperform the S3 (as they should) in terms of sound performance (with better mids and slightly stronger bass).
Summary: Had these headphones for a couple of years now and thought it was about time I left a review. the sound from these is incredible! due to the oval shaped design they sit comfortably and plug your ears creating incredicle sound isolation. I can hardly hear anyone talking even with no music on.
Summary: Volume is low, bass is minimal and they do not stay in my ears while running (or even in a static position for that matter), despite which ear rubbers i put on them. I stopped using these and replaced them with Panasonic ones that sounded better. Do not recommend.