HEM

Hi-Res Balanced Armature in-ear headphones

Features

  • Latest Hi-Resolution Knowles™ Balanced Armature Drivers for an immersive performance.
  • Acoustially calculated and vibration free Lexan™ earpiece for comfortable and fatigue free fit.
  • Linear-Phase crossover for seamless driver integration . Two replaceable cables included: microphone cable when listening music on-the-go and high-end cable made of OFC and silver for the best performance.
  • Luxury accessories included: Comply™ soft, memory foam premium eartips and a waterproof polycarbonate case.

 

color 

Optoma NuForce HEM2 monitor single balanced armature in-ear earphones headphones

Optoma NuForce HEM4 in-ear monitor dual balanced armature earphones headphones

NuForce HEM6 Hi-Res Triple-Balanced Driver In-Ear Headphones earphones Black

Optoma NuForce HEM8 in-ear monitor quad balanced armature earphones headphones

HEM

Overview

 

Employing the latest Balanced Armature Driver technology and advanced crossover design, the innovative and Hi-Res Audio certified HEM in-ear headphones represent a pinnacle achievement in performance and value. The HEM headphones reveal a whole new element of musical space to audio enthusiasts, redefining the stantard of premium portable sound.

HEM8 紅銅時代
Copper Limited Edition
 Limited 300 available    Learn More   

Four models to provide the best performance in each price point

HEM2

1BA

Balanced Armature X1

Red/Blue/Black

Red   Blue   Black

USD$ 199

HEM4

2BA

Balanced Armature X1 Balanced Armature X1

Red/Blue/Black

Red   Blue   Black

USD$ 299

HEM6

3BA

Balanced Armature X1 Balanced Armature X2

Black

Black

USD$ 399

HEM8

4BA

Balanced Armature X2 Balanced Armature X2

Black

Black

USD$ 499

Balanced Armature Drivers  Balanced ArmatureFull range     Balanced ArmatureBass     Balanced ArmatureHigh fequency

Impressive performance

The HEM in-ear headphones are an innovative family of cutting-edge designs; each excelling in performance well beyond the price point. All based on the Hi-Res Audio certified Balanced Armature Driver technology and on the attention on finest details. The result is a series of headphones that deliver lightning-fast transient speed and percussive attack, extremely high output, varnishing levels of distortion and a degree of musical coherency that simply begs your audition. Their electrical impedance is free of extremes in magnitude and phase, allowing them to be used with smartphones, tablets, computers as well as headphone amplifiers.

 

Hi-Res certified Balanced Armature Drivers

The HEM headphones are equipped with multiple Knowles™ Balanced Armature Drivers. These drivers are Hi-Res Audio certified, and precision balanced and adjusted for seamless performance. The individual drivers are optimally tuned for specific frequency ranges.

 

Hi-Res Mark

Linear-Phase crossover

With ultimate performance as their goal, from the onset NuForce engineers employed the latest computer modeling tools for developing a proprietary process of achieving a true linear-phase crossover design that, unlike most others, does not sacrifice low distortion performance or frequency linearity.

 

Vibration free Lexan™ earpiece

To improve fit, comfort and performance, and to avoid listening fatigue, the HEM headphones have been constructed with acoustically modeled, vibration-free Lexan™ earpieces. The earpieces are robust but at the same time lightweight. The angle and diameter of the sound nozzle have been optimised for the best possible performance.

HEM

Two removable earphone cables included

The HEM headphones come with two earphone cables; one with microphone and inline remote for listening to music on-the-go, and one high-end cable for the best performance. The high-end cable is hand-made and manufactured from the finest OFC copper and silver. The 2-pin cable connectors are made of proprietary mix of silver and copper with separate ground return for each channel. Both cables are free of micro-phonic effects and noise as well as tangle free.

HEM

 

Balanced Armature Drivers

A balanced armature driver is superior to a single dynamic driver as it doesn’t flex or create distortion. Developed to attain the highest level of clarity and neutrality the armature drivers far exceed the accuracy of the single driver (inner speaker) found in most headphones and earphones. The HEM headphones use multiple such drivers for each ear, imitating the working of a full range professional speaker. Due to the miniature size of the Balanced Armature driver a number of drivers can be combined together to create a full range sound field. The result is an astonishing life-like, lush and accurate sound that is able to maintain clarity even at the highest volume levels and retrieve critical details at very low volume levels.

Crossover

Using multiple drivers require a frequency dividing crossover network. This crossover network assigns a given frequency band to its respective driver, and therefore just as with any loudspeaker, it represents the critical “heart” of the total system. The ultimate system performance cannot be achieved unless the crossover topology results in a seamless blending of the individual drivers’ outputs into a single, coherent response that is void of significant distortion and extreme variations in frequency.

Optoma NuForce engineering undertook a challenge of desiging a headphone crossover with no such attitude of compromise as an option. Nothing but a truly optimized response for each of the individual HEM models was acceptable. To meet this challenge, an advanced level of computer modeling was required, but the tools commonly employed in loudspeaker design had no counterpart in the headphone world. Therefore, the only solution was to start over and find ways to modify and adapt existing tools to the task, and then apply a bit of innovative thinking to overcome the crossover part limitation issue.

For the ultimate in musical accuracy and coherency, extensive multi-variant nodal analysis & computer modeling has been employed in the development of the HEM headphones. The result is a full-spectrum design that exhibits both linear frequency and phase response.

Performance

Each HEM model offer an incredibly smooth frequency response seldom seen in any Balanced Armature Driver headphone regardless of price, a linear phase response for delivering lightning-fast transient speed and percussive attack, extremely high output capabilities sufficient for reproduction of dynamic peaks well beyond the tolerance limits of human hearing and varnishingly low distortion levels.

If ultimate-fidelity headphone listening is your passion, then one or more models of the NuForce Balanced Armature Driver headphones is also destined to become the cornerstones of your headphone playback system as well.

Luxury accessories

For maximum comfort, the HEM retail package includes two types of eartips in a range of sizes so you can be assured of a snug, slip free fit. These include Comply™ soft, memory foam premium eartips which shape themselves to fit perferctly in the ear canal, offering superior isolation and performance. The package also includes a waterproof and airtight polycarbonate case, a small carrying pouch, cleaning tool as well as airline adapter.

HEM

Specification

 HEM2HEM4HEM6HEM8
Plug typeΦ3.5mmΦ3.5mmΦ3.5mmΦ3.5mm
Cable length1380mm (OFC)
1380mm (Mic)
1380mm (OFC)
1380mm (Mic)
1380mm (OFC)
1380mm (Mic)
1380mm (OFC)
1380mm (Mic)
Driver typeKnowles™Hi-Res
Balanced Armature
Knowles™Hi-Res
Balanced Armature
Knowles™Hi-Res
Balanced Armature
Knowles™Hi-Res
Balanced Armature
DriversComes with two drivers, one in each earpiece.Comes with four drivers, two in each earpiece.Comes with six drivers, three in each earpiece.Comes with eight drivers, four in each earpiece.
ColorRed/Blue/BlackRed/Blue/BlackBlackBlack
Max-Input113dB124dB124dB122dB
Impedance26Ω38Ω37Ω32Ω
Max-Power2mW2mW2mW2mW
Microphone sensitivity-42 ±5dB-42 ±5dB-42 ±5dB-42 ±5dB
Frequency response20Hz – 40KHz18Hz – 40KHz18Hz – 40KHz10Hz – 40KHz
Sensitivity110dB ±3dB113dB ±3dB113dB ±3dB124dB ±3dB
Weight (without cable)3.4g5.2g5.8g6.4g

HEM2

 
Plug typeΦ3.5mm
Cable length1380mm (OFC)
1380mm (Mic)
Driver typeKnowles™Hi-Res
Balanced Armature
DriversComes with two drivers, one in each earpiece.
ColorRed/Blue/Black
Max-Input113dB
Impedance26Ω
Max-Power2mW
Microphone sensitivity-42 ±5dB
Frequency response20Hz – 40KHz
Sensitivity110dB ±3dB
Weight (without cable)3.4g
 

HEM4

 
Plug typeΦ3.5mm
Cable length1380mm (OFC)
1380mm (Mic)
Driver typeKnowles™Hi-Res
Balanced Armature
DriversComes with four drivers, two in each earpiece.
ColorRed/Blue/Black
Max-Input124dB
Impedance38Ω
Max-Power2mW
Microphone sensitivity-42 ±5dB
Frequency response18Hz – 40KHz
Sensitivity113dB ±3dB
Weight (without cable)5.2g
 

HEM6

 
Plug typeΦ3.5mm
Cable length1380mm (OFC)
1380mm (Mic)
Driver typeKnowles™Hi-Res
Balanced Armature
Comes with six drivers, three in each earpiece.
ColorBlock
Max-Input124dB
Impedance37Ω
Max-Power2mW
Microphone sensitivity-42 ±5dB
Frequency response18Hz – 40KHz
Sensitivity113dB ±3dB
Weight (without cable)5.8g
 

HEM8

 
Plug typeΦ3.5mm
Cable length1380mm (OFC)
1380mm (Mic)
Driver typeKnowles™Hi-Res
Balanced Armature
DriversComes with eight drivers, four in each earpiece.
ColorBlock
Max-Input122dB
Impedance32Ω
Max-Power2mW
Microphone sensitivity-42 ±5dB
Frequency response10Hz – 40KHz
Sensitivity124dB ±3dB
Weight (without cable)6.4g

Accessories

+ Silicone tips: Six pairs in different sizes, two colors.
+ Comply tips: two pairs in (L/M).
+ Water – and air tight polycarbonate carrying box for the earphones.
+ Carrying case.
+ 3.5mm to 6.3mm connector.
+ Cleaning tool.
+ Safety guide.
+ High End OFC earphone cable.
+ Earphone cable with microphone.
+ Cable clip.

Reviews

Media(20)
It isolates well and comes with a great accessory package. A Pelican-style case protects everything. "
Nuforce HEM2. Great fit, amazing price, and sound worth it at almost any price. Nuforce’s HEM2 is killer from any angle you look. "
NuForce delivers with its HEM4 a convincing overall package which could be located somewhere between consumer-and professional equipment. "
The HEM6 have met all, absolutely all requirements with the highest brilliance. Heights were reproduced crystal clear without sounding exaggerated or too hard, even if there were a alongside a deep groovy bass. "
They sound great, they’re comfortable to wear for long periods of time, and they should last a while. "
Right out of the box, the NuForce HEM6 satisfyingly premium in just about every which way. It comes with an impressive number of accessories…” 
“Clearly, these are the in-ear headphones to get for supreme sound performance. "
Part of me would like to report that there’s absolutely no reason to pay that much for in-ear monitors, but the HEM8 headphones make a strong case that you really do get a lot more for your money if you’ve got that much to spend. They sound incredible."   
“They’re for serious listening. If you spend more than a couple of hours a day playing music through headphones, the fact that they don’t cause ear fatigue could make them worth the investment. "
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. "
Optoma's NuForce earphone lineup offers solid options for the serious music lover on a reasonable budget… At normal volumes, the HEM2 delivers a clean, balanced audio experience, and ships with a wide assortment of accessories that puts many competing earphone models to shame. "
Optoma's NuForce earphone lineup offers solid options for the serious music lover on a reasonable budget. The $199 NuForce HEM2 is an in-canal pair with excellent audio performance geared toward those who want sound approaching flat response, but without sacrificing bass completely. "
NuForce has done a great job with their new HEM line-up. The lightweight, ergonomic shells ensure comfortable listening sessions. The accessories package with two cables, two cases, and three kinds of tips is generous”
“HEM8 are easily my favourite IEM in the lineup.  HEM8 is the clear winner as the most balanced, musical IEM of the bunch. "
Stepping up once again, we come to the HEM6 triple-BA IEM. These strike me as a marriage of the HEM2 and HEM4 sound signatures. You get the fuller, warmer bass + mids of HEM2 coupled with the upper end sparkle of HEM4. "
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. "
HEM2 has a nicely-balanced sound signature on the warm side of neutral.”
“The mere fact that I really liked them on first listen and was reminded of one of my all-time favorite IEM is pretty damn impressive in my book. "
在聲音表現上,HEM8展現了平衡電樞單體清透明亮的特
質,音質細膩,解析力強,在空間感與泛音細節上特別優異
"
HEM4整体的声音走向有着NU家族的特色,基本上都是偏向中下盘偏暖的调音,有些美式的感觉,不会出现类似TF10、EXK那种爽快的高频。但是HEM4比起NU之前的作品,在调音上可谓突破不少,声音偏松软,柔和不刺激,最大的亮点莫过于它的人声表现。还有就是多了HI-RES的信仰小金标。 "
一条清亮可人的人声塞要说NuForce HEM4到底适合听什么我的回答是:?“人声”HEM4的人声属于比较中性而又略微偏冷的风格,这样的调音会使得歌手的声音变得年轻、干净。 "
HEM6高强度防水耳机收纳盒,Comply耳套,无氧铜平衡特殊编织线材,耳机便携包,在目前的3000元价位左右的耳机里,可用豪华二字来形容。当然,耳机才是最重要的。HEM6耳机腔体选用Lexan低谐振PC材质,黑色款给人低调内敛的感觉以及出色的手感,该材质能够减少共振。贴耳的曲线设计长时间佩戴也不会感觉到不适。 "
HEM取自Hi-Res Ear Monitor之缩写,并取得了 Hi-Res Audio认证,因此Optoma NuForce HEM入耳监听式耳机系列,正正是针对Hi-Res Audio,所打造的全新动铁单元监听式耳机系列,让音乐不论于音质或高频细节上,都可展示更精密与细致的表现。 "
为了追求更高的音质表现,HEM系列采用Lexan(PC聚碳酸酯树脂)材质来制作耳机外壳,原厂特别强调这个机壳拥有高刚性的优点,可以降低机壳振动,避免音质受到影响。此外,耳机线材也很讲究 ,这次NuForce为HEM搭配的是OFC无氧铜镀银(20%),而且是采用可更换线材式设计,确保耳机更加经久耐用。 "