Nuforce HEM2 Reference Class

Hi-Res In-Ear Headphones w/ Single Balanced Armature Drivers


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NuForce HEM2 Reference Class In-Ear Headphones

The NuForce HEM2 In-Ear Headphones w/ two Balanced Armature Drivers Offer an Incredible Listening Experience

The Hi-Res Audio certified NuForce HEM earphones are an innovative audio series with cutting-edge designs. The four models are all engineered based on the latest Balanced Armature Driver technology and on the attention to the finest details. These luxury high-quality earphones are perfect for those who demand balanced sound with crystal clear highs and explosive bass.

THE GOODS: What Sets the HEM Series Apart?

NuForce’s HEM Series feature the well-known Knowles™ Balanced Armature drivers. Balanced armature drivers are one of the most electrically efficient ways to create extremely accurate sound. This combined with NuForce’s Linear-Phase crossover, acoustically calculated and vibration free Lexan™ earpiece makes for a seamless driver integration. They also feature two replaceable cables: one with microphone, and one high-end cable made from silver and OFC copper. The HEM series are certified Hi-Res audio headphones by the CEA (Consumer Electronics Association) and Japan Audio Society to recreate true-to-life audio reproduction.

The NuForce HEM2 In-Ear Headphones w/ two Balanced Armature Drivers Offer an Incredible Listening Experience

The HEM Series also comes in different driver configurations to suit everyones needs and budget. There's the HEM8 w/ eight drivers total, HEM6 w/ six drivers total, HEM4 w/ four drivers total, and the HEM2 w/ two drivers total. The higher number of drivers, the more accurate and full sounding the headphones will be, and all versions are Hi-Res certified.

The Optoma NuForce HEM2 earphone pair ships with an impressive array of accessories and delivers a wonderfully balanced audio experience.

- Tim Gideon, PC Magazine

Sony Hi-Res Audio

General Features:

  • NuForce HEM2 In-Ear Headphones w/ Single Balanced Armature Drivers
  • Knowles Balanced Armature Drivers (1 per each ear) for an immersive performance
  • Acoustically calculated and vibration free Lexan earpiece
  • NuForce Linear-Phase crossover for seamless driver integration
  • Two replaceable cables: one with microphone, and one high-end cable made from silver and OFC copper
  • Comply™ soft foam ear tips for enhanced isolation and sound quality
  • Cable is constructed from 20% silver-plated OFC copper conductors
  • Three-way phase-coherent crossover design that achieves linear phase performance
  • Also Available in:
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product Specifications:

  • Maximum input power: 2mW
  • Impedance: 26 Ohms
  • Maximum input sound level: 113dB
  • Frequency response: 20 - 40,000 Hz
  • Sensitivity: 110dB +/-3dB
  • Ear coupling: In-ear
  • Jack plug: 3.5mm (4 pole-stereo)
  • Cable length: 4 ft (1.38 meeters)
  • Number of driver(s): 2 total
  • Weight w/ cable: 0.7oz

What's in the Box?

The NuForce HEM2 In-Ear Headphones w/ two Balanced Armature Drivers Offer an Incredible Listening Experience
  • NuForce HEM2
  • Silicone tips: Six pairs in different sizes, two colors
  • High End OFC earphone cable
  • Comply tips: T-100 two pairs in (L/M)
  • Water - and air tight polycarbonate carrying box for the earphones
  • Carrying pouch
  • 3.5mm to 6.3mm connector
  • Cleaning tool
  • Safety guide
  • Earphone cable with microphone

Headphone Design

Headphone Type

This is the design of the earpieces on the headphones. Some headphones go inside the ear, while others rest on the outside of the ear. This helps you know exactly what type of headphones you will be receiving.

In-Ear: The ear buds go into the ear. Most often, the right and left ear buds are two separate pieces.

Enclosed-Ear: Usually are found on the larger headphones. They rest on top of the ear and have padding for comfort, as well as enclosing the ear to the speaker. This type of headphone helps to filter out surrounding noise.

On-Ear: This type of headphone involves the speaker sitting gently on the ear without going in the ear or sealing it off.

Headband Type

Headphone type refers to the construction of the headphones.

Around the Ear means that the headphones wrap around the ear to provide a secure fit. This is most often seen in active and sports headphones.

Around the Neck means that the headphones wrap around the neck. This is also seen in active and sports headphones.

Earbuds means that the right and left sides of the headphones are separated and will fit securely into the ear. These are small, compact, and user friendly.

Over the Head headphones mean that the right and left speakers are connected with a support that goes over the head and rests on top. This is the typical headphone type.

Specifically For
Some headphones can use an IR Transmitter in your vehicle, while some can be plugged into your media device and be used on the go or at home.
Headphone Application

This is the application that the headphones are designed for. Each application has unique features that make it perfect for particular uses.

DJ: These headphones are durable, loud, and will often allow for one ear listening.

Gaming Delivers explosive sound and allows you to communicate with others.

Home Hi-Fi: These audiophile headphones are engineered to produce high fidelity and accurate audio.

Home/Office: These headphones are designed to produce rich, brilliant sounds that the artists would appreciate.

Sports: Designed for active use. These headphones are made to stay in (or on) the ear during workouts.

Kids: Feature noise limiting technology so that your little ones don't damage their ears listening to music too loud.

On-the-Go: On-the-go headphones are lightweight and often fold up for easy storage and portability.

Student: Compact and rugged enough to survive life in a backpack; inexpensive enough to not hurt the wallet of a student.

Studio: Reproduce music perfectly without any coloration. Look here for reference quality studio monitoring headphones.

Traveler/Airplane: These headphones are compact, lightweight, and have a portable design.

Acoustic Principle

The basic design of the headphones. There are 3 different types:

Open: Have ports that allow air through the back of the diaphragms, enabling the headphones to sound like the music is coming from an outside source.

Closed: Completely sealed and have no air passing through the diaphragms. Sounds like you are in a closed off room.

Semi-open: Have slots or ports in the back of the cup and are partially open. This allows for a mixed sound between an open and closed headphone.


General Features

Noise Reduction technology removes unwanted noise from a signal. Background or ambient noise can be removed to produce clearer speech and enhanced hearing. Typically these Active Noise Canceling (ANC) headphones are powered and use batteries to activate the noise canceling technology. Also referred to as Noise Reduction or Noise Cancellation.
Device Controls & Compatibility
Refers to the devices the in-line controls are compatible with.
Universal Volume
Built-In Microphone
This means that the headphones or earbuds have a built-in microphone. This can be a microphone on the cord, built into the headphone, or even a boom microphone. These mics can be used for music devices like iPods, for Smartphones to make and receive calls, or for gaming purposes.
Boom Mic
This means the sound of these headphones can be customized to your listening preference through either an app or on-board controls.
Headphone Connection
This is how the headphones connect to the audio source.

Corded means that the headphones use a cord to transfer the audio signal.

Bluetooth means that the audio signal is transmitted from your device to the headphones via a Bluetooth connection.

Corded or Bluetooth means that the headphones can be used as corded headphones or as Bluetooth headphones. They have an input in one or both earcups for use as a corded headphone while they also have a built-in battery for use as Bluetooth wireless headphones.

Wireless means that the audio signal is transmitted wirelessly to the headphones.

Volume Adjustment
Volume Adjustment means that the headphone (independent of the source) can adjust the playback volume. Many headphones and ear buds have in-line volume control, which allows adjusting the audible volume from a switch on the headphones cord. Other headphones have a volume knob on the headphone can.
Connector Type
The type of connection the headphones use to connect to receive the audio signal from a music source. Traditional headphones use an analog 3.5mm headphone jack. Newer technology has allowed digital signals to be sent directly to the headphone using an Apple Lightning or USB-C cable.
Jack Size
Refers to whether the headphones use a 3.5mm or 1/4" headphone jack connection.
Included Adapters
Refers to the connection adapters included with the headphones like 3.5mm or 1/4" input adapter as well as airplane adapters that let you use your headphones with airplane specific headphone jacks.
3.5mm Adapter
Detachable Cable
Refers to whether the cable can detach from the headphones. If a pair of headphones has a detachable cable, the cable can be replaced with a longer cable, one with (or without) a microphone or if you accidentally damage the cable.
Color Shades
Primary color shades of the headphones.
Refers to materials used to build the headphones. Most headphones are built from some combination of plastic and metal to give you a durable pair of headphones.
Ear Cushion/Earbud Material
Refers to the material that the ear cushions/earbuds are made from. Ear cushions and earbuds are available in a variety of materials, ranging from basic rubber eartips to plush leather ear cushions intended for maximum comfort.
Replaceable Ear Cushions
Refers to whether the ear cushions can be removed and replaced. Often times on heavily used headphones, the ear pads can wear out long before the actual headphones. Headphones with replaceable earpads often last much longer than headphones without replaceable earpads.
Protective Case
Refers to whether a pair of headphones come with a protective case.
Softshell Case
Weight (oz.)
This is the weight of the unit in ounces.
0.70 oz.
Water Resistant
This refers to the level of water resistance of the fitness tracker. Some fitness trackers are water resistant and can be used while swimming, while others are only splash proof or should not be used near the water.
Child Safe
Refers to whether a pair of headphones are designed specifically for children. Child safe headphones feature volume limiting technology so that your child can’t damage their ears while listening to music.
Ear Hooks
These headphones feature hooks that wrap around your ears for a secure fit.

Audio Features

Driver Type

The physical design of the driver in the headphones.

Balanced Armature:
A balanced armature driver uses a coil wrapped around an armature which is held in between two magnets until it is stimulated by an electrical current. When stimulated, this armature is magnetized which causes it to rotate one way or the other around a pivot point which moves the diaphragm to create sound. Balanced armature driver headphones are generally earbuds and can have multiple drivers in each earbud.

Dynamic drivers are the most common driver type. They feature a permanent magnet, usually neodymium, a voice coil and a conical diaphragm to drive your music. A dynamic headphone driver looks pretty much identical to any typical home theater speaker.

Electrostatic drivers are made up of an extremely thin membrane, usually a coated PET film, stretched between two metal plates. An electrical signal is applied to the metal plates to create an electrical field which, depending on its polarity, draws the speaker diaphragm toward one of the plates which forces air through the perforations in the diaphragm which generates the sound wave.

Planar Magnetic:
A planar magnetic driver is made up of a large membrane suspended between two sets of oppositely aligned magnets. An electric charge is applied to the membrane to induce movement and produce sound waves.

Balanced Armature
The opposition to electric current, a higher impedance means a higher electrical resistance. This is measured in ohms.
26 ohms
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
110 dB
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
20 - 40,000 Hz
Audiophile headphones represent some of the finest headphones available. Audiophile headphones produce genuinely outstanding sound quality as well as extraordinary build quality, components and comfort. They are truly the finest headphones available.
Built-in Amplifier
This refers to whether the headphones have an amplifier built-in.
Amplifier Recommended
This refers to whether a separate headphone amplifier is recommended for use with a specific pair of headphones. It is highly recommended that any headphone with an impedance greater than 100 ohms be amplified.
Pass Throughs
Refers to whether a pair of headphones has an output to connect to another pair of headphones.

What is in the Box?

Main Product
The main product in the box.
Nuforce HEM2
Accessories included with the headphones
1/4" Adapter
Carrying Case
Cleaning Tool
Replacement Ear Tips
Secondary Cable
Paperwork included with the product.
User manual
Warranty/Registration card

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Seguin Tx


March 27, 2018

These headphones sound nice and clear and not very loud which is good for heating safety. They are constructed of high-quality materials and come with good-looking cases.

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Seattle, Washington

Nuforce HEM2

July 28, 2016

i use these primarily with my phone and rarely with an amp. that being said, they sound great, incredibly clear, they dont give much bass compared to my w50s. they're probably the most comfortable pair of in-ears ive ever worn, the cable that wraps around your ears doesn't irritate my ears at all, ive had that problem with other headphones with similar design (w50s..).

the case these come with seems pretty much indestructible, so that's nice. i also like that it comes with a cable with a mic in it, so many higher end headphones don't have a mic, that combined with the case make these my favorite headphones for travelling (not exactly what they're intended for, i know). durability wise, they seem like they'll last just fine, especially if you keep them in the case. the braided cable might have some issues as the split seems kind of flimsy.

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Nicely Done

June 24, 2016

The HEM2s pair nicely with the uDAC5. The HEM2s come with two cables and an wide range of different ear tips. I used them with the isolation tips. The isolation tips do a very good job of blocking out external sound. Now it doesn’t block all of the sounds but enough of it. I did find the foam tips to be a little uncomfortable which why the silicon tips are more usable with my ears.

I found the bass to be a tad impactful and it does not merge into the other frequencies. In dub-step and DnB songs I found the bass to be tight and not muddy at all.

When I listen to songs with drums I can hear the snare snaps and high hats so clearly. The higher frequencies are the right amount producing great clarity and detail.

Sound stage is small. Vocals are a tad out of my head and it was hard for me to place the location of the voices in some songs. Although in some songs it sounded like they were in front of me.

Separation between instrument and voices is very good. I can easily tell everything apart from each other.

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New York

It's just ok

June 1, 2016

I tried this pair of earbuds but I feel like it's just ok quality. I like the wire though since it's tangle free.

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Canoga Park, CA

Sound good and light weight

May 27, 2016

I got these for the portability of in-ears, but picked these specifically because they seemed a lot nicer than most of the others I was looking at. I'm very surprised how good these sound, they seem very clear. Not much on the low end of the frequency spectrum but i'm sure if I messed with an equalizer I could open up the bottom end a little more. Over all I enjoyed these.

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SLC Utah

pretty cool lil buds

May 27, 2016

i've been using these for a few days now, and overall they are really nice sounding. very crisp sound, you can really hear every different instrument in the mix, and they sound very detailed. the only downside for me personally is they are lacking bass. Perfect for many types of music, but i'm tryna bump some hip-hop and the bass just doesn't do it for me. Don't get me wrong still a great pair of headphones, and i really like the design, they are very comfortable, probably good for the gym (but i don't workout lol) just not enough bass!

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Costa Mesa, CA

Nice looking

May 19, 2016

I really like the look of these and they sound great. I'm wasn't sure what 199 headphones should sound like but they are definitely better than the skull candy and other headphones I've used. I'm a happy camper for now.

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Salt Lake City, Utah

For School

April 26, 2016

Hey everybody. I bought the HEM2 in a bundle with the Nuforce amp that Sonic had and I'm glad I did. I use these mainly when I'm on the move at school but when I'm in the library or at home i'll use the amp too. These sound really really good and my brother liked them so much he says he'll probably get one soon. These are way better than my beats earbuds and I like the color. Only downside is I hate taking them off in class because I'd rather listen to music than the lecture. Is that bad?

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Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Nuforce HEM2 Reference Class

  • NuForce HEM Series In-Ear Headphones | Product Unboxing
  • NuForce HEM2 In-Ear Headphones | CES 2016

Item Added to Cart

Nuforce HEM2 Reference Class

Hi-Res In-Ear Headphones w/ Single Balanced Armature Drivers


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