Excerpt: Used with an iPhone 3Gs.
Compared to ER-6i, these are more detailed, sometimes perhaps even too much, depending on your source material. Isolation is superb. Tones are natural, the frequency spectrum is balanced.
Excerpt: I have the more refined ER-4Ps also, as well as $1350 Ultimate Ears custom-molded units. I find Etymotic a good balance between accuracy and price. I mix on the ER-4Ps more than the UEs because they don't falsely emphasize bass (a problem with in-ear units due to contact with your skull).
Excerpt: For best sound, try the different plugs that come with the headphones. The tighter the seal, the better the sound. Also, iPod's "small speakers" equalizer setting provides a good bass boost and treble reduction.
Excerpt: Owned a pair of Etymotics for years and loved the passive noise isolation. Just plug them in and the noise goes away especially the low frequency drumming on plane flights but time reduced the volume on one side (you need to be careful when removing them and not just pull on the cord) so I thought...
Excerpt: these earphones were a replacement to an older model that i had for a few years. their size and quality are what drew me to the product, and i continue to be very satisfied with the sound quality of my new pair, as well as with my old set.
Summary: Etymotic Research's HF5 in-ear earphones worked well on a transpacific flight. Seventy-five percent of engine noise was cancelled and most of speech was nicely muted. They were comfortable but had to be inserted "deeply" to attain reasonable bass and noise isolation.
Summary: For some time, I've owned an ER4p with the adapter that made it into an ER4s. Strictly from a sound viewpoint, these are super IEMs. But the physical design left much to be desired for carrying around with my IPODs, especially the Nano. The HF5 addresses the design issues.
Summary: I recently came into the market for an upscale set of canalphones. The market is now flooded with options most notably from Shure and Ultimate Ear. Sennheiser just came out with three new models and then you've got Etymotic's offerings.