Excerpt: I'm an acoustics professional with a pro audio background, and after much research and comparative listening, the ER-4's are the clear winner on the IEM market. The frequency balance is as close to flat as I've found in an IEM and compares favorably to my reference headphones and loudspeakers including HD650's and Focal monitors. The soundstage, isolation, and dynamics are as good as more expensive IEM's I've tried.
Pros: Accurate, Flat Response, Good Bass, Good Value, Great Sound
Excerpt: I purchased the Etymotic Research ER-4PT because I was going on a plane trip and I wanted the maximum passive noise isolation and the clearest sound reproduction possible. These ER-4PT headphones did not disappoint. Once in the ear, most noise, specially plane engine noise, disappeared and I could hear my music clearly.You will pay a premium for this luxury but it is well worth it since the clarity of sound is awesome.
Pros: Durable, Good Value, Great Sound, Lightweight, Optional Custom Ear Tips, Stylish
Excerpt: I lost my prized HF5's and decided to make the leap to the ER-4pt's. I am pleased with my choice. These have a more robust construction than the HR5s, which felt dainty in comparison. The sound is a little more accurate and immersive than the HR5's. I love to close my eyes and being able to visualizes the musicians playing the individual instruments rather than the coarse overview of the music that I got from every other headphones I have owned.
These new ones are perfect and even include an adapter that flattens the frequency ...
G. Stogdon "Giles", Amazon
28 January 2015
Summary: This is my second pair. I managed to decapitate the plug on the old pair after 5 years of constant use. I soldered on a new plug but the earphones were never quite the same... These new ones are perfect and even include an adapter that flattens the frequency response at the higher end to compensate for CD playback.
These remain the most likely best in-ear earphones ever made
9 January 2015
Summary: These remain the most likely best in-ear earphones ever made. Yes they are very costly, but on a plane, if you insert them correctly into the ear, the engine becomes a distant hum and you can really focus on the sound/movie you are using; a tranquil and pleasant experience.
#very pleased, have bought 2 sets before this and will continue to buy them.
ednun pourtahmasbi, Amazon
7 December 2014
Summary: This is now my 3rd pair of these earphones. The design has not changed for many years. I purchased my first set back in 2006. They died in 2010, on to the 2nd set, then, my 3rd were bought at the end of 2014. 4 years may not seem like a long time, but I use these for 2 hours a day, 5 days a week sometimes more on the tube. That is a lot of winding and unwinding the cable. Couple of tips: 1.