Astell & Kern Billie Jean Purple In-Ear Monitors

Billie Jean is the latest collaboration of In-Ear-Monitors (IEMs) between Astell&Kern and Jerry Harvey Audio (JHAudio) 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 experience of producing the award-winning SIREN Series IEMs, which is loved by music enthusiasts around the world, Astell&Kern 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.

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.

Features

• Advanced Shell Design
• Dual Balanced Armature Drivers
• Unique Bore Design for Presence & Brilliance
• Twisted Silver Tinsel Cable
• Made In Korea

Specifications

• Model: Billie Jean
• Type: Universal Fit IEM
• Driver Unit: 2-Way, 2-Driver (High/Mid&Low), 2BA per-side
• Impedance: 18 Ohm
• Sound Technology: Freqphase Time | Phase Waveguide New Sound Bore
• Components: 3.5mm Unbalanced Cable, x3 sizes of silicon eartips (SML), carrying case

More Information

• https://us.astellnkern.com/products/billie-jean-purple/