Luxury Hi Res-Audio Certified In-Ear Monitors

HEM4

  • High Resolution- certified — for studio-quality audio
  • Twice the frequency range of other balanced armature IEMs — up to 40,000 Hz
  • Linear-phase crossover for seamless driver integration
  • Latest-generation Knowles™ balanced armature drivers for incredible accuracy
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The High Resolution certified HEM series set a new standard for accuracy, speed and comfort. Designed for music lovers and professionals, these innovative in-ear headphones offer budding artists, home recording musicians and DJs incredible audio reproduction. Combining the latest balanced armature driver technology with advanced crossover design, the HEM series reveal a wider frequency range for the ultimate listening experience.

Available for purchase at these online retailers:

High-Resolution In-Ear Headphones

The High Resolution-certified HEM series sets a new standard for accuracy, speed and comfort. Designed for music lovers and professionals, these innovative in-ear headphones offer budding artists, home recording musicians and DJs incredible audio reproduction. Combining the latest balanced armature driver technology with advanced crossover design, the HEM series reveals a wider frequency range for the ultimate listening experience.

Hi-Res Performance

The HEM series of in-ear headphones lets you hear every track in exceptional clarity — for rich, full-bodied sound. The combination of cutting-edge design and Hi Res-certified balanced armature driver technology results in balanced sound with crystal-clear highs and explosive bass.

Crossover Design

The HEM series incorporates a three-way phase-coherent crossover design that achieves linear-phase performance. The result is a natural, three-dimensional soundstage, lightning-fast transients and crystalline transparency.

Knowles™ Balanced Armature Drivers

Featuring the latest generation of balanced armature drivers, the HEM series can reach frequencies as high as 40,000Hz — twice the frequency range of other balanced armature IEMs. Each HEM model houses either four (HEM8), three (HEM6), two (HEM4) or one (HEM4) Knowles™ balanced armature drivers in each earbud  designed to produce pure, authentic sound from a compact body.

Pure Sound, Wherever You Go

Two tangle-free cables are included so you can choose between a microphone and in-line remote for convenience and a high-end cable for the best possible performance. The high-end cable is made of OFC and silver, while the 2-pin cable connectors are a proprietary mix of silver and copper with a separate ground return for each channel.

Vibration-Free

Constructed with acoustically calculated, vibration-free Lexan earpieces, the HEM series allows for prolonged listening without fatigue at any volume level. The in-ear monitors are lightweight, making them ideal for use at home, in a recording studio, on stage or on the go.

Superior Comfort

For maximum comfort and performance, HEM4 comes with two types of ear tips in a range of sizes for a snug, slip-free fit. These include Comply soft memory foam ear tips which shape themselves to fit perfectly in the ear canal, offering superior isolation from noise and creating incredible bass response.

Additional information

TECHNICAL SPECIFICATIONS
ColorBlue
Max Input Power2mW
Number of Drivers4
Specifications
Cable Length1.38m
Carton Weight0.5
Connections Input3.5mm Jack
Connections Output2 pin connector for each ear piece
Connector Type3.5mm (4 pole-stereo)
Crossover TypeLinear Phase
Driver TypeHigh resolution knowelsª balanced armature
Frequency Response18Hz – 40,000Hz
Impedance38 Ohms
Inline RemoteTrack+,Track-, Play, Pause, Answer phone, Disconnect phone
Max Input Sound Level124dB
Microphone Sensitivity-42dB+/-5dB
Sensitivity110dB+/-3dB
Unit Weight0.005
  • HEM Family Data Sheet

  • HEM4-DS-en-US

  • HEM4-300-1

  • HEM4-300-2

  • HEM4-300-3

  • HEM4-300-4

  • HEM4-300-5

  • HEM4-300-6

  • HEM4-300-7

  • HEM4-300-8

  • HEM4-300-9

  • HEM4-300-10

  • HEM4-300-11

  • HEM4-300-12

HEM4

,
March 13, 2017

"Advanced in-ear headphones with neutral sound. They offer analytical and detailed sound and are feather-light and sit rock-solid, even when jogging. In addition, the package is convincing – all in all a good candidate with a good price."

HEM4

HiFi Pig,
January 26, 2017

“I have reviewed a number of Optoma IEMs in the past and this product was for me the pinnacle of my acoustic travels with the company.”

“Playing Britten’s Sinfonia da Requiem (24/96kHz, Kansas Symphony Orchestra, Michael Stern) on that bicycle helmet looking IEM gave a transparency of sound that more than met its price point.”

“At a penny under £250, these IEMs are a highly recommended choice for the serious music listener and professional alike. With musicality pouring out of everything I played with both warmth and clarity, it played classical music with affection and heavy rock with grunt. Once you get used to inserting in your ears you will wonder why you didn’t wear earphones this way before.”

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HEM4

head-fi.org,
June 22, 2016

“NuForce has done a great job with their new HEM line-up. The lightweight, ergonomic shells ensure comfortable listening sessions.”

“Stepping up from the HEM2, we come to the HEM4 double-BA IEM. These stick out as the more “reference” sound signature in the lineup.”

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HEM4

Headflux.de,
August 8, 2016

“NuForce delivers with its HEM4 a convincing overall package which could be located somewhere between consumer-and professional equipment.”

“The HEM4 is packed with a wealth of accessories that includes 2 cases and 2 cables. In addition to the accessories, you get of course the In-ear itself which convinces qualitatively.”

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HEM4

Audiovision,
August 10, 2016

“High-res music files will be played by the blue Optoma in-ears with an astonishing precision. Mozart Violin concert with 24 bit and 192 kHz, normally something for bigger over ear headphones, sounds incredible with spatial and amazing clarity.”

“The instruments sound razor-sharp, even hectic sequences remain supreme.”

“High-res sound in miniature – the NuForce HEM4 from Optoma make it possible. The in-ear lightweights are even an option for classical music lovers and it comes with a huge range of accessories.”

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HEM4

testedtechnology.co.uk,
December 8, 2016

Tested Technology explains Hi-Res audio with some help from the Optoma NuForce HEM4 in-ear headphones:

“The technology is genuinely serious too—this is definitely not a Beats-type stitch-up.”

“…the HEM series uses a curiously snail-shaped enclosure made of Lexan, a proprietary lightweight thermoplastic polymer resin used in jet fighter canopies for its strength, impact resistance and—particularly significant in audio applications—mechanical stiffness.”

“The stiffness of Lexan resists the tendency of the HEM4 enclosure to resonate in sympathy with the sound waves being delivered, so you get nothing more nor less than what the input signal is meant to deliver.”

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HEM4

wegotmusic.de,
March 8, 2017

“So much quality is rare in the in-ear segment. With the Nuforce HEM4 everything seems to be right. Material selection, sound reproduction, equipment and a really good and passive noise cancelling.”

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HEM4

techreviewer.de,
August 1, 2017

“The Optoma NuForce HEM4 in-ear headphones are a class above. Thanks to the linear frequency response, these in-ears are particularly suitable for the demanding music listener, who prefers a well separated and detailed sound quality.”

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HEM4

delamar.de,
March 13, 2017

“Advanced in-ear headphones with neutral sound. They offer analytical and detailed sound and are feather-light and sit rock-solid, even when jogging. In addition, the package is convincing – all in all a good candidate with a good price.”

Read More

HEM4

Gadgetynews,
April 10, 2017

The HEM4 gives a clear and detailed presentation. I got a great sense of texture and tonality with an impressive soundstage.

These IEMs produced the kind of accuracy I would expect from more expensive earphones. Classical and acoustic music was handled with warmth and definition, whilst the heavier end of my catalogue had bite and power.

Some may find these lacking in the lows but everything was nicely balanced to these ears.

 

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HEM4

EarIN,
May 12, 2017

“In terms of sound, the HEM4 impress first of all with its great dynamic sound. All musical content simply sounds incredible right from the start.”

Price/ performance: good – very good.

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HEM4

Hifitest.de,
October 4, 2017

“It doesn’t matter which music content you play, the HEM4 plays unbelievably”

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HEM4

HiFi Choice,
December 14, 2017

It is a well-made earphone and the blue finish on the housings is smart without being too obtrusive.

Its presentation is very slightly forward, which gives it a consistently lively and exciting edge.

The use of an armature for the bass instead of a dynamic driver seems to lend it speed and definition that is very useful whenever there is a more complex arrangement to deal with and, as before, it does well to draw you into the performance.

In the noisiest surroundings, it is able to keep any interference at bay without the need to raise the volume.  Combines with the useful level of sensitivity on offer and the inline remote, the HEM4 performs well with lower-powered sources, ensuring it is a tempting prospect for commuters