Billie Jean, Blue
Billie Jean, Blue
+ Free AK XB10
Limited Time Promotion: Purchase a Billie Jean and receive a FREE AK XB10! Now through August 31, 2018.
Advanced Shell Design
Dual Balanced Armature Drivers
Unique Bore Design for Presence and Brilliance
Twisted Silver Tinsel Cable
Made In Korea
Billie Jean is the latest collaboration of In-Ear-Monitors (IEMs) between Astell&Kern and Jerry Harvey Audio which feature a new Dual Balanced Armature (BA) driver system. It is another winning product created by combining the experience and know-how of Jerry Harvey’s IEM design and the quality production of Astell&Kern.
Billie Jean brings to life a real audio experience that will take your music to the next level.
Utilizing our experience of producing the award-winning SIREN Series IEMs, which is loved by music enthusiasts around the world, we were able to achieve a new level of accomplishment for those who enjoy a genuine music experience.
Billie Jean features the patented freqphase® technology from Jerry Harvey Audio with a new internal sound bore design to bring clear and impeccably balanced sound from sub-bass to brilliance range. The new IEM shell has been optimized to fit nicely in the ear, utilizes a 2-way 2-BA design, Silver Tinsel cable and L-type plug in a small, compact package. The result is a brilliant pair of IEMs designed and built by Jerry Harvey, the inventor of custom-IEMs, and Astell&Kern, the global leader in Hi-Fi audio.
"Meet Billie Jean, the first dual driver Universal fit IEM from Astell&Kern and Jerry Harvey Audio. The Billie Jean IEM features Jerry’s iconic Rock ‘n Roll sound; a well-balanced and wide soundstage, incomparable dynamic range and Jerry Harvey Audio’s patented Freqphase® technology make this an IEM not to be missed. Billie Jean is the perfect match to compliment any Astell&Kern player." - Jerry Harvey
THE SIREN SERIES
Jerry Harvey Audio has developed a whole new Balanced Armature Driver to offer reference quality IEMs for mastering and mixing works. The high-range drivers are designed to deliver everything with minimum distortion, while the ultimate mid driver offers perfect, flat sound from 10Hz to 5kHz.
The bass driver was designed for an even steeper low-pass effect with no distortion.
Freqphase™ Time | Phase Waveguide
Most Multiple Driver IEM's suffer from phase and timing issues. Low, Mid, and High drivers all have different impulse times. The higher it is, the faster the impulse time of the BA Driver. The lower it is, the slower the response speed. This causes improper arrival times and Phase shifts.
The "Billie Jean" applies Jerry Harvey Audio's patented "Freqphase" technology, which uses precisely cut tube lengths for each driver to minimize the phase shift of each frequency. This allows for the High, Mid, and Low drivers to be aligned to 1/100ms for the most ideal phase curve. It ensures the correct time alignment and phase of all drivers resulting the most accurate music reproduction in the industry.
2-Way 2-BA Drivers
The Balanced Armature drivers used in Billie Jean are a customized BA only available from Jerry Harvey Audio and is designed to bring more power with less weight. Billie Jean will surprise you with efficient, yet powerful sound.
Jerry Harvey Audio’s Freqphase®, Timephase, and Waveguide technologies allow this 2-way 2-BA IEM to deliver the full range of audio performance anytime.
The special Acoustic Chamber Sound Bore design has been carefully crafted to bring a wide soundstage with incomparable dynamic range, without adding any interference.
We highly recommend you try Billie Jean with your favorite tunes, which will never sound the same again.
Shaped for a Precise Fit
Billie Jean is over 30% smaller compared to Michelle Limited. Its design has been optimized after a series of studies of different shapes of ear canals from both men and women of different ages. It fits and sits perfectly in your ears without bulkiness.
The cable used in the Billie Jean is not common copper. Instead, it is a copper cable plated with silver.
Silver Tinsel Cable with detachable 2pin connector
The Universal Fit Billie Jean is the perfect companion for Pro Audio applications such as sound monitoring. With the noise isolation design and the IEM know-how from Jerry Harvey Audio, you will get the best fit and comfort while you enjoy your tunes in a new way.
The cable is manufactured by first compressing the silver plated copper wire, which is then flattened and rolled into a steady interval that is then used to wrap around the Kevlar. This newly developed cable has astounding tensile strength and delivers the full dynamic range of music. There is a 3.5mm Unbalanced cable provided.
Conventional straight cables do not handle the frequent bending of cables and often short out. The intertwined cable disperses the stress to the cable and offers better resilience. It's also easier to wear around the outer ears as the cable shape can be easily adjusted for the best fit.
The brand name of Aramid fiber that DuPont USA manufactured.
It is very lightweight and more durable than nylon, and has the advantage of being very tough. Because it is made of light weight organic polymers such as carbon, nitrogen and hydrogen, allowing it to be 5 times more stronger than steel. Kevlar is particularly strong against friction and is commonly used for body armor and aircraft tires due to its excellent shock absorption.
The utmost in Bluetooth listening pleasure: AK XB10
High-quality Bluetooth, AK XB10: We added high sound quality to the wireless freedom!
The AK XB10 uses aptX™ HD technology, the latest Bluetooth codec from Qualcomm. 24-bit HD audio that was simply not possible with previous Bluetooth technologies can now be fully enjoyed with aptX™ HD.
Along with DAC, amp, and essential components of fine audio, the AK XB10 delivers a distinctive difference in sound from conventional Bluetooth products.
- Qualcomm® aptX™ HD
- Capable of transmitting up to 24-bit/48 kHz audio that is faithful to the original audio file.
- Perfect Sound
- Equipped with a Hi-Fi DAC capable of reproducing high-quality sound up to 24-bit/192 kHz
- Dual Audio Output
- Equipped with both 3.5mm unbalanced & 2.5mm balanced audio outputs
- iOS & Android Compatible
- Compatible with all iOS, Android, and many other Bluetooth devices
- Handsfree Function
- Supports voice calls and features a built-in microphone: receive calls when using earphones without a microphone
- Design Concept
- Inspired by Astell&Kern's principal design motif of light and shadow.
High-quality Bluetooth, AK XB10
We added high sound quality to the wireless freedom!
Now it's possible to use aptX™ HD, the latest Bluetooth codec of Qualcomm to receive 24bit high-quality data wirelessly, and it's designed to faithfully play back the transmitted high-quality data using Astell&Kern's own sound technology.
Music via Bluetooth without compromise
The AK XB10 delivers a distinctive difference in sound from conventional Bluetooth products. The moment you hear it, you wonder "Does this sound really come from Bluetooth?"
Astell&Kern's outstanding technologies are throughout aptX™ HD to support 24bit/48kHz Bluetooth performance, along with DAC and AMP, essential components of fine audio.
The utmost in Bluetooth listening pleasure: AK XB10.
Qualcomm® aptX™ HD
While the AK XB10 is a device that wirelessly transmits audio data from smartphones via Bluetooth, it is quite different from conventional Bluetooth devices, in that it supports the aptX™ HD Bluetooth codec.
Just as the display resolutions of televisions evolved from standard to high-definition to 4K ultra-HD for sharper image quality, we are now in the era in which Bluetooth now supports 24-bit audio resolution. 24-bit HD audio that was simply not possible with previous Bluetooth technologies can now be fully enjoyed with aptX™ HD.
Typically used in professional broadcasting, the original aptX™ audio codec is widely used for 16-bit near-CD quality sound. The benefits of the aptX™ codec include superior compression, low computational cost, and low transmission delay.
Launched in early 2016, the next-generation aptX™ HD codec is capable of transmitting up to 24-bit/48 kHz audio that is faithful to the original audio file.
* Devices connected to the AK XB10 must support the aptX™ and aptX™ HD codecs for 24bit audio playback.
SBC vs. aptX™ vs. aptX™ HD
Bluetooth codecs can be easily compared to data packet efficiency.
Comparing data packet capacity in a Bluetooth transmission to passengers on a bus, the SBC codec is only capable of seating one passenger per bus. The aptX™ codec can seat three passengers, while the aptX™ HD codec can seat five.
Just like having the ability to fit more people on one bus, the aptX™ HD is far more efficient than other audio codecs.
More information and data can be transmitted if lesser data is lost in a given transmission.
The AK XB10 is equipped with a Hi-Fi DAC capable of reproducing high-quality sound up to 24-bit/192 kHz. Its analog amplifier was tuned using Astell&Kern's own sound technologies to complete the package.
A digital-to-analog converter (DAC) converts digital data into analog signals in a digital media player (DMP). The AK XB10 is equipped with a dedicated DAC for the best digital-to-analog signal conversion that significantly improves Signal-to-Noise Ratio (SNR) and Total Harmonic Distortion (THD).
While a typical analog amplifier simply amplifies and outputs low level audio signals, the Astell&Kern amplifier in the AK XB10 is different.
Rather than simply amplifying the audio signal, the amplifier was designed with a "driving" concept to amplify weak signals and power difficult to drive high impedance headphones. A strong signal is required to drive headphones with a high impedance. The AK XB10’s analog amplifier is more than capable of handling the task.
For example: when comparing the amplifier to a camera, using the zoom function to enlarge small objects in a viewfinder is much like how a common amplifier performs. However, the AK XB10’s amplifier is similar to the way a pan focus function clearly focuses blurry images.
Simply put, the Astell&Kern amplifier focuses on the weak signal.
Dual Audio Output
"Oh, no! My earphones aren't compatible!"
Have you ever seen a tiny headphone jack where ordinary earphones cannot be plugged?
This is known as a 2.5 mm "sub-mini" audio connector. It's also known as a balanced connector. Modes of transmitting an analog signal can be divided into balanced and unbalanced. An unbalanced connection typically consists of a signal (L + R) and the ground. The ground is supposed to prevent external noise, but noise can still be introduced to the signal and can affect transmitted signals that causes variations and noise in sound.
The balanced connection was developed to reduce ground noise as the signal is transmitted. This connection adds a reverse phase signal (L + R) to an unbalanced signal (L + R) to diminish the noise.
The balanced connection has several advantages compared to an unbalanced connection. The same noise (common-mode noise) that occurs in a signal + reverse-phase signal can be eliminated and output is increased since two separate signals are transmitted.
Thus, it is only natural that we include a 2.5mm jack on the AK XB10 for audio enthusiasts. Enjoy a deeper level of sound through the AK XB10's balanced 2.5mm output.
iOS & Android Compatible
The AK XB10 is compatible with all iOS and Android devices.
The AK XB10 supports the SBC, aptX™, and aptX™ HD codecs for Android devices and the AAC codec for iOS.
Forget about device compatibility issues, turn on your smartphone’s Bluetooth, and connect the AK XB10.
You can also connect any laptop/notebook that supports Bluetooth.
You will be transported to a new world of sound the moment the AK XB10 is connected to your smartphone.
When you receive a call while listening to music with the AK XB10, should you turn off the Bluetooth function before answering?
Should you unplug your earphones from the AK XB10 and connect them to your phone?
NO! Of course not!
For the ultimate in convenience, the AK XB10 supports voice calls and features a built-in microphone so that you can receive calls when using earphones without a microphone.
Press the button once to receive a call while connected via Bluetooth and press and hold the button to reject a call. Easy peasy.
The AK XB10's design was inspired by Astell&Kern's principal design motif of light and shadow.
With this design concept, the AK XB10 was shaped to mimic the appearance of the scattering of light from a star (astell in Greek means star).
The top surface of the AK XB10 is split into quadrants, which allows easy operation with just a touch of the hand. It may look simple, but the AK XB10 was produced only after careful consideration of both design and usability.
The AK XB10 has one more defining feature – its clip.
When you want to enjoy your music but don’t want to be tied down, simply mount the clip to the AK XB10 and clip it to your shirt or bag. This simple clip further enhances the portability and keeps your hands free. The AK XB10 is even lighter than the energy bar you eat while exercising.
Now, are you ready for the ultimate convenience in Hi-Fi audio?