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  • Etymotic Research ER4P MicroPro Noise-Isolating In-Ear Earphones (Discontinued by Manufacturer)
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Etymotic Research ER4P MicroPro Noise-Isolating In-Ear Earphones (Discontinued by Manufacturer)

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  • Highest noise-isolating earphones on the market
  • Reduction of outside noise reduces the risk of listening at unsafe levels
  • Designed for audiophiles, musicians and sound engineers
  • Assortment of ACCU-Fit eartips included to ensure proper seal and comfort and 1/4 inch stereo adapter
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Technical Details

  • Noise-Isolating-Feature

Product Details

  • Product Dimensions: 8.2 x 5.2 x 2.7 inches ; 1 ounces
  • Shipping Weight: 12 ounces
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0007WZLDC
  • Item model number: ER4P
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (231 customer reviews)
  • Date first available at Amazon.com: September 14, 2004

Product Description

Product Description

The ER-4P MicroPro noise-blocking earphones from Etymotic Research offer realistic sound reproduction and noise isolation that far surpasses that of active noise-canceling earphones.

Amazon.com

The ER-4P MicroPro noise-blocking earphones from Etymotic Research offer realistic sound reproduction and noise isolation that far surpasses that of active noise-canceling earphones. The ER-4P earphones--which require no batteries--can be plugged into any audio source. They can be used with portable CD, MP3, DVD, and other players without an additional amplifier.

The ER-4P earphones were designed to match the response of the ear, creating nearly perfect sound reproduction. They reduce external sound naturally by sealing your ear canals, without the added weight, bulk, or external power supply required for active noise-canceling. Their external noise exclusion (up to 33 dB using the supplied 3-flange eartips and 41 dB with foam eartips) lets you hear the full dynamic range of recordings without your having to play them at unnaturally high and unsafe levels.

What's in the Box
ER-4P MicroPro earphones, a 5-foot cord with 3.5 mm stereo phone plug, a .25-inch stereo phone adapter plug, six 3-flange eartips, 10 foam eartips, a filter-changing tool, 4 replacement filters, a shirt clip, a zippered pouch, a storage box, a user's manual, and warranty information.

Customer Reviews

The noise isolation is great!
Big Al
The bass tones are as punchy and clear as the higher frequencies and there is no muddying of the sound with clarity throughout the spectrum.
Mick Morley
Furthermore, if you're paying this kind of money for them (in Europe they still cost more) you need to also buy headphone amplification!
Bruno Alexandre F. Dias

Most Helpful Customer Reviews

326 of 336 people found the following review helpful By Joshua G. Feldman on October 14, 2006
Format: Electronics
I'm on record with a total rave of Etymotic's ER-6 headphones - but the ER-4P is vastly more satisfying. The difference is bass (the most immediately obvious difference). The ER-4p has phenominal bass for headphones - probably state of the art in this reguard. But what makes the ER-4p really special is its amazing dynamics. The soundstage is huge, and sonic textures leap out of velvet silence. It's hard to characterize superb dynamics. Music sounds "bigger". Quiet passages have more presence - and louder passages have more inner detail. Another strength of the ER-4p is that the extra bass energy allows the vibrant treble detail to sound balanced - not strident or analytical (as the ER-6 can sometimes sound). Between the dynamics and the bass, the ER-4p ends up sounding more musical and alive than the ER-6 (and thus virtually every other earphone). There is a touch of mid-bass ripeness - sometimes deep voices like Mark Knopfler sound a little chesty. There's also a downside the huge dynamics - sometimes a touch of congestion can creep in during crescendo peaks. The flip side of this is that quiet passages can have enormous presence and emotional power. Small scale accoustic stuff and female vocalists shine and have amazing presence. Nora Jones, for example, has never sounded better. Big rock doesn't suffer either. The fantastic treble detail and huge deep bass makes both classical and rock really slam. These really are amazing phones.

There are the usual caveats of an in-ear-canal headphone: Ear-canal type headphones like these must be inserted ALL the way down into the ear canal to get good bass. The better the seal the better the bass. One of my ear canals isn't straight and I sometimes have trouble getting that ear's earphone properly positioned.
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95 of 99 people found the following review helpful By Michael Twa on January 6, 2006
Format: Electronics
I owned the ER-6i headphones for about a year before I left them on an airline seat and made someone's day. I loved them and most of what I liked about them factored into my decision about what to replace them with. I shopped the Shure models and several others, but I really did like the performance of the ER-6i. So why did I go for the upgrade? While the ER-6i's were overall excellent (4 stars by me), at times they seemed incapable of providing a full bass response at reasonable volumes. They either were dull at low volumes or distorted at high volumes. Yes, there are times when I play my music too loud, that's why I choose headphones, so I do not annoy others with my often odd musical tastes. I do expect a good headphone to be capable of delivering good bass.

The ER-4p excels where the ER-6i fell a bit short. With either model it matters a lot how you seat the ear pieces. A poor seal (insufficient depth) results in very little bass. Correct insertion provides the best external sound isolation and the best bass reproduction. I find the white plastic flange type earpiece comfortable for long periods of wear, but your experience may differ if you have an anatomically smaller than average ear canal. There are foam inserts as an alternative and you can even purchase optional smaller foam ear pieces that I have not needed. Since they do fit so snug and deep in the ear you will soil them. I only hope whoever decided to keep my ER-6i's enjoyed that mine were well used. The ER-4p comes with two spare pairs of flange earpieces and 5 pairs of foam covers. You will use them.

The sound isolation is excellent. I share an office with two other mates without cubicles. The in-ear design has been a lifesaver.
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77 of 82 people found the following review helpful By Steward Willons TOP 1000 REVIEWERVINE VOICE on January 18, 2007
Format: Electronics
I recently purchased a set of ER-4Ps and while the glowing reviews presented here are pretty much justified, I must take issue with a few points. In my experience, these earphones do not have the bass presence that so many reviews mention. I would definitely describe it as anemic. Even bass-heavy music such as drum 'n bass or jungle comes across incredibly weak. It's as if listening to music through a high-pass filter. As a composer/producer, I've listened to a lot of audio transducers and I trust my ears. I am not one of those guys who turns the "bass knob" all the way up and such. I believe in flat frequency reproduction to yield the most accurate representation of the composer's creation.

That said, these largely depend on the style of music you enjoy. I find listening to acoustic music very rewarding with these earphones. Bartok's "Music for Strings, Percussion, and Celeste" has never had such amazing clarity. Bartok's dense weave of strings each find a space in the mix and the dynamic range is quite good. Feldman's "Rothko Chapel" is also particularly nice with its haunting mixture of small, delicate sounds. However, if you're a fan of electronic music (or any music that has a strong bass component), these are going to disappoint. You're much better off with a pair of headphones (such as the Grado SR60s) than the ER-4Ps.

I know the idea of the 4Ps is to work well without a dedicated headphone amp (are they are much more efficient than the 4Ss), but I'm not satisfied using them with my iPod nano. While I've never thought the iPods had amazing sound quality, the 4P/nano combination is particularly bad.
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