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Etymotic Research HF2 Earphones (iPhone Compatible) - Ruby

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  • There is a newer version of this item available - copy and paste B007TCXFRM into the Amazon search bar
  • Headset and earphones for iPod, iPhone and other mobile phones
  • For music phones and music players that take 3.5 mm/4-contact phone plus stereo plug
  • Highest noise isolation of all competing headsets
  • Exceptional sound quality, 20Hz-16kHz frequency response accuracy, 16 Ohms impedance
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Technical Details

Color: RUBY
  • Size (LWH): 3.75 inches, 2 inches, 6.75 inches
  • Weight: 4 ounces
  See more technical details

Product Details

Color: RUBY
  • Product Dimensions: 3.8 x 2 x 6.8 inches ; 4 ounces
  • Shipping Weight: 5 ounces
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B001I44LSY
  • Item model number: ER23-HF2-RUBY
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (243 customer reviews)
  • Amazon Best Sellers Rank: #388,513 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
  • Date first available at Amazon.com: September 14, 2004
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Product Description

Color: RUBY

Product Description

The hf2 is a high-fidelity, hands-free noise-isolating headset and earphones combination. But it's really much, much more than that. The hf2 provides a near-perfect music experience. Made by Etymotic Research, the people who created in-ear earphones, the hf2 delivers Etymotic's world-renowned sound quality in a comfortable, convenient wireless phone headset, so you'll never miss a call! Headset includes a high-sensitivity microphone and a Music/Call button that allows you to quickly answer calls while contolling your music. You'll be able to hear and be heard, clearly, even in a noisy environment. The hf2 includes the in-ear headset and earphones, assorted eartips so you can find the ones that fit you best, carry pouch and filter changing tool with filters.Works with iPhone and other music phones that operate with a 3.5 mm/4-contact phone + stereo plug. Compatible with most music players (e.g., iPod, mp3, CD) that accept a 3.5 mm stereo plug. hf2 headset + earphones can be worn with the cables in front or in back of the head. The cable slider can be adjusted by moving it up or down for a snug fit.

From the Manufacturer

A no compromise, high-performance noise-isolating headset and earphones that delivers best-in-class benefits and superior value, perfectly matched to the latest product innovations from most smartphones that support a 3.5mm, 4-conductor stereo phone plug. The hf2 features a close-proximity, high sensitivity microphone that works with many popular smartphones and tablets from Blackberry, Samsung, HTC, Motorola Mobility, HP, and of course, Apple.

Etymotic's hf2 looks and feels great, too. With a soft-touch finish in 3 color options (Black, Ruby, and Cobalt), the hf2 ships to you with an assortment of noise-isolating ACCU-Fit ear tips to ensure proper seal and comfort. You also have the option of ordering custom molded eartips with Etymotic's CUSTOM-FIT program.

Etymotic hf2
The hf2 delivers best-in-class benefits and superior value
Best Sound Accuracy

Etymotic hf2 earphones deliver 85%+ response accuracy from 20 Hz - 15 kHz. hf2 achieves the highest output sensitivity in its class with 105 dB SPL sensitivity at 1 kHz at 0.1 mV, thanks to Etymotic's Accu-Driver high performance, precision matched, balanced armature drivers.

Best Noise Isolation

Etymotic's specially-designed earphone tips create 35 dB - 42 dB of noise isolation, which is the highest documented noise isolation of any earphones or headphones on the market today. This earphone headset comes with several types of eartips--3-flange, foam, and glider--to help you achieve a comfortable fit while retaining maximum noise isolation.

Etymotic mc2
Compatible with Blackberry and Android as well as iPhone, iPad, and More

The Etymotic hf2 headset works with smartphones and tablets including, but not limited to, those running Android, Blackberry, Windows Phone, HP WebOS, Symbian and Apple iOS. With feature-compatible devices, you can play or pause music, change tracks, and change volume in addition to answering and ending phone calls.

Functionality for send/end, play/pause, forward/back track varies with device manufacturers' software. Please verify that your phone or tablet supports a 3.5 mm 4-conductor stereo phone plug.

Integrated Cable Slider

An inline cable slider makes cable management easy. The hf2 headset can be worn with the cables in front or in back of the head. The cable slider can be adjusted by moving it up or down for a snug fit.

Works with "AWARENESS! for Etymotic" iPhone App
Etymotic mc2

AWARENESS! for Etymotic is an innovative earphone app for anyone who uses an Etymotic headset and needs to hear sounds around them. AWARENESS! for Etymotic listens to your surroundings while you listen to music, and allows any sound louder than normal background noise can be heard in your earphones. From hearing that truck while it's still down the road to hearing when someone asks if you'd like a cup of coffee in the office, or when the phone or doorbell rings at home, you can maintain spatial audio awareness for better safety in any environment.

Use with music, videos, games, and audiobooks while traveling, in the office, at home and at the gym. The app works with all Etymotic headsets (except Bluetooth models), and works best with noise-isolating headsets such as the Etymotic hf2, hf3 and mc3.

Upgrade to a CUSTOM-FIT

Custom molds can be made for all Etymotic earphones and headsets. CUSTOM-FIT molds enhance your listening experience. They provide a comfortable, secure fit and do not alter the exceptional sound quality of the earphones. Register your Etymotic headset at etymotic.com/customfit and print out a voucher. Find a network provider on the CustomFit page who can make impressions of your ears and order custom molds for your Etymotic product.

What's in the Box

Etymotic hf2 earphone headset with 4 foot cable, assorted eartips, filter tool with replacement filters, storage pouch.

Technical Specificationsm

  • Frequency Response: 20 Hz - 15 kHz
  • Accuracy Score: 85%
  • Transducers: Balanced armature
  • Noise Isolation: 35-42 dB
  • Impedance (@1 kHz): 16 Ohms
  • Sensitivity (@1 kHz) SPL at 0.1V: 105 dB
  • Maximum Output (SPL): 120 dB
  • Cable: 4 ft with 3.5 mm plug

Customer Reviews

The second time, customer service blamed me and wouldn't replace.
As they provide a lot of noise isolation, they are ideal for traveling in noisy environments.
Etymotic is known for their quality sound, and the hf2 does not disappoint.
Chris Tofteberg

Most Helpful Customer Reviews

113 of 118 people found the following review helpful By Personal Robot VINE VOICE on July 24, 2008
Color Name: BLACK Vine Customer Review of Free Product ( What's this? )
You've seen those people with earphone-mic combos for those phones - you know, *those* people who walk around, holding the mic up to their mouth, who might as well pull out the earphone and just hold the phone up to their ear. Are they uncomfortable, thinking that the mic won't pick up their voice, or are they compensating for a lackluster microphone? If the latter, that will not be necessary with the Etymotic HF2 earphone headset, whose mic is every bit as strong as the one built into most phones, if not better.

I tested this set with an Iphone 3G, and those on the other end were not able to guess that I was on a headset microphone rather than the Iphone's admittedly high-quality mic - that's a great compliment right there. The mic, which hangs about three inches below the right earphone, seems to be able to filter out background noises, as well. As for controls, it's simple - there's one button on rectangular microphone unit. Press once to answer or hang up a call, twice to send a call to voicemail.

As for sound quality of the headphones, they're fantastic, and that's no surprise given the pedigree associated with the Etymotic name. I'm an Ety fan - I have a pair of Ety ER6i as well as their "big brother" the ER4P, and the sound quality of the HF2 ranks right around the ER6i, which should be excellent for most people. Those not familiar with the "Etymotic sound," it is extremely clean, and many may find it lacking in bass, but it is very true to the recorded sound, unlike many other cheaper (and sometimes similarly priced) earphones. What you hear with Etymotics is a very accurate, if sometimes stark, representation of the sound that the artists captured. They are not good headphones for those looking for huge bass response.
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38 of 39 people found the following review helpful By herschel on September 1, 2008
Color Name: BLACK
I've used in-ear headphones and monitors almost exclusively for just over two-years now, both for use on-stage music monitoring, and for day-to-day ipod listening. Obviously, comparing in-ear monitors to in-ear headphones isn't quite fair -- they don't do the same thing. But, judging each pair for how well they succeed at their given task, i would definitely say the ER HF2s are hands-down the best pair of headphones I own.

(I currently use a pair of EarPeace LiveWires for on-stage music monitoring, and have used Shure E2s and E3s... And, having just started using an iphone, I decided to upgrade a little from the Ultimate Ear super-fi 3s I was previously using for my ipod.)

The HF2s are clean and transparent -- I won't go too far into detail about that here, given the glut of other reviewers saying the same thing. I will say, though, that the HF2s are really very impressive across the volume board -- they seem to provide the same punch for low-volume listening as they do at higher volumes; unlike my UEs, there's no "sweet spot" that they need to be set at in order to reproduce well. And unlike any other pair of in-ears I've owned, I truly can forget that I'm listening through headphones with this pair; unlike so many others that constantly make you aware of exactly how much they're coloring the tone (for better or worse), the HF2s really just step back and let the pure tones come right through. Highly impressive.

(Of course, the casual headphone buyer is probably not willing to spend this much dough for headphones -- so I won't spend too much time pointing out that if you're used to having your home or car EQ goose your bass way up, or if you use a pair of phones that have super-jacked-up bass drivers, you'll be disappointed with these.
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23 of 25 people found the following review helpful By Bryan Newman VINE VOICE on June 26, 2008
Color Name: BLACK Vine Customer Review of Free Product ( What's this? )
I have to admit, I was a long time believer in the law of diminishing returns and did not believe in buying high end electronics for a very small incremental return. We held out against HD TV until our old TV died. When we finally got HD we were amazed so much we ended up rewatching nearly our entire DVD collection to see everything we have been meeting.

I had the same reaction when I first tried these ear buds. I was amazed at the sharpness of the high tones. The first song I listened to was the dresden dolls and I could make out every drum beat and each key stroke on the piano rang out. I really was like HD audio without any changes to the media or ipod. It took a while to be able to just be listening to music again, I was so impressed by the clarity.

There were two big reasons I wanted these head phones. First I wanted to be able to listen to my Ipod touch on my bus commute without having to crank up the volume. This worked perfectly, I can now greatly reduce the volume and get far more clarity than I was getting before with the buds that came with the ipod. Watching movies is also far easier now because the isolation makes hearing dialog much easier. The second reason I got these was to use with the upcoming iPhone 3G. I am looking forward to using it when I get one.

Here are the Pro's and Con's as I see them.


These have by far the best sound I have ever experienced in headphones. They are comfortable, or at least after a couple of days to get used to the feel of them. Once properly inserted, I had full mobility with no fears of them slipping out. I was worried about replacement covers, but then I looked into the box again and found the two bags that contained dozens of replacement covers - very nice touch.
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