Please forgive me for resurrecting such an old "dead" thread here. But after reading some of the comments (especially the first few in this thread), does anyone recommend the Sony Hybrid tips for use with the S4's? My main goal right now is to mask (or eliminate) the harsh sibilance.
Sony Hybrids seem to seal well with most people. I don't own S4s, so I wouldn't know if they fit. If they do, it's definitely worth a try. I've also heard that the sibilance goes away with burn in/use.