Etymotic ER-4P Portable In-Ear Earphones

I'm surprised that no review has been written about those gems! The ER 4P/S is one of the best IEMs in the market value wise. They are made to last, they isolate like no other IEM and they have a unique flat frequency response which can be easily adjusted if you have a good equalizer or an integrated amp. The ER S will sound best when used with a powerful amp, it will provide an amazing sound stage and wonderful imaging of instruments and players. They can provide life like details of the recording including movements, coughs, breathing and pages turned over depicted with extreme clarity. Highly recommended.

Imagine the flattest IEM that ever existed, take it and add a roll off to make it less clinical and more musical. You have the ER-4P.

The ER-4P is never harsh sounding, or even clinical... I would classify it as slightly dark sounding despite what many think. The bass hits hard with no noticeable roll off. One of its weaknesses is probably the lack of soundstage, however the pinpoint imaging is very good.

Its major weakness is the treble roll off, but I'm not sure whether I'd call that a weakness as it was somewhat intentional I believe. When compared to the ER-4S, the ER-4P has more body in the sound and a recession in the upper treble... think cymbals and stuff. The ER-4S is also more detailed and the bass is perceived to be less.

Nobody's likely to steal these based on their looks alone, which are kind of stylish in a teutonic minimalist sort of way, but it's disappointing when people wearing neon pink plastic get more compliments that you. The plus, of course, is the amazing sound quality. If you don't mind getting hit by the bus you didn't hear, these are the best choice for amped or unamped portable sound; even an iPod can drive them acceptably, and better players like the Sony X can drive them fantastically.

These headphones give a great fit and outstanding isolation, the sound is very detailed and analytical, perfect if you need to work on tracks in a busy/noisy environment. However, I would not recommend them for casual listening as something like the vsonic gr07 or brainwavz b2 gives a much more enjoyable sound.

For a non Custom IEM that has everything in spades you cant go past his guy.

Get the adapter and becomes S model and amped raises the bar again.