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Astell & Kern Rosie In Ear Monitors (Universal IEM)

Special Price $799.00 Regular Price $999.00
Out of stock

Moon Audio Best Seller Badge

Sold Out & Discontinued.

The Rosie is the fourth universal IEM in the Siren Series collaboration between JH Audio and Astell & Kern.  The Siren Series iems allow you to hear the music how the Recording Artist and Mix Engineer intended.

Main Features:

  • Custom-made Proprietary Balanced Armature Drivers
  • Powered by soundrIVe technology
  • Variable bass output, adjustable from cable
  • Frequency ranges (10Hz to 100Hz)
  • Integrated 4th Order crossover
  • Triple Bore with Stainless Steel Tubing
  • Noise Isolation -26dB
  • 3.5mm unbalanced and 2.5mm balanced cables included

The 1st reference/mastering IEM from Jerry Harvey Audio

AK Rosie Full metal jacket

Full Metal Jacket

Each Body, Cap and Sound bore are machined from one Solid Block of Aluminum with Carbon Fiber Logo Plate insert.

AK Rosie Siren Series

All new proprietary Driver designs

This series of IEM’s were designed to be used as a Mastering reference tool because the high driver was designed for optimum top end extention with minimal distortion. The mid driver is perfectly flat from 10Hz to 5kHz. Low driver designed for steeper low pass and with virtualy no distortion.

AK Rosie Freqphase

FreqPhase Technology / Stainless Steel Tube Waveguide

FreqPhase corrects Time and Phase of multiple Drivers. The Waveguide ensures each driver signal arrives within 0.01 milliseconds, resulting in a Phase coherent IEM.

Variable bass output, adjustable from cable

User controlled low frequency drivers with the adjustable bass (0 - +15dB).

Frequency ranges from flat bass response up to +15dB (10Hz to 100Hz)

AK Rosie IEM

4-pin Cable Connection with Machined Aluminum Locking Collar

4-pin cable connection with Machined Aluminum Collar mechanism provides a more secure and strong connection with earpiece and will also help to protect it from sweat and dust.

Astell &Kern AK Rosie AK380

Astell & Kern AK380 & Rosie Universal IEM

Additional Balance Cable for Astell&Kern

AK380 / AK320 / AK240 / AK120Ⅱ / AK100Ⅱ provides a balance output with its specific 2.5mm 4pole terminal. Rosie is originally designed and tuned for the AK380 balance output and provides a balanced cable specially made to connect to the AK380.

This originally designed 3.5mm and 2.5mm cables are specially made by Moon Audio in USA and both are included in the package.

Hand Crafted IEM made in the USA

Jerry Harvey JH Audio founder

Jerry Harvey - JH Audio Founder

Jerry Harvey Audio is proud to manufacture Rosie by using old school craftsmanship, while using the most cutting edge Technology.

The fourth offering in the Siren Series is aptly named after the iconic ACDC Song “Whole Lotta ROSIE”. Then legendary Lead Singer Bon Scott was inspired to pen this song after having a one night stand with a “rather large” Tasmanian women. Rosie is still in ACDC set today and a fan favorite.

"The 6 driver ROSIE is reminiscent of the legendary JH 13. Rosie has the extention and silky defined Mids of the JH 13 with the adjustable Bottom and weight of the Roxanne. Rosie is a game changer in IEMs below $1000.00."

– Jerry Harvey

  • Custom-made Proprietary Balanced Armature Drivers (6BA per side)
  • Powered by soundrIVe technology : Dual low, Dual Mid and Dual High balanced armature drivers per side
  • Variable bass output, adjustable from cable : user controlled low frequency drivers with the adjustable bass (0 - +15dB). 
  • Frequency ranges from flat bass response up to +15dB (10Hz to 100Hz)
  • Integrated 4th Order crossover
  • Triple Bore with Stainless Steel Tubing
  • Noise Isolation -26dB
  • Moon Audio IEM cable for 3.5mm unbalance and 2.5mm balance cable both are included in the package


Universal fit IEM

Driver Unit

Custom-made Proprietary Balanced Armature Drivers [8BA per side]

Frequency Response

10Hz to 23kHz

Input Sensitivity

117dB @ 1mW


17 ohm
Freqphase time l phase WaveGuide


Jerry Harvey Audio Patent Number
  • Freqphase : US Patent 9,197,960
  • Jerry Harvey Audio locking Connector : US Patent 9,172,180
  • Adjustable Bass System : US Patent 9,161,170
  • Freqphase Control Method and System : US Patent 8,925,674
  • Dual driver dual high : US Patent 8,897,463
  • Dual Bore System : US Patent 8,567,555

5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Not What I First Thought
I bought this IEM on Drew's recommendation to pair with my Calyx M. I was very disappointed when I first tried it, and doubly so because I knew I couldn't return it. It was muddy, bloated - pretty horrible though.
But I remembered reading that it came with the bass fully maximized. What the hell, I'll turn it down a bit. I set it to the 12 O'clock position and suddenly the treble started to shine and ring like crystal, the midbass appeared and the bass firmed up wonderfully. It's a different animal with the tamed bass.
February 16, 2017
A Top Performer at this Price!
These A&K JHA Rosie IEMs are simply fantastic at this price point.

The construction is best in class with the machined housings, adjustable bass, and quality connectors and cables. Of course, the most important thing is how do they sound?!

The sound is detailed and accurate across the full spectrum. Individual instruments are easily revealed with the combined sound being very musical. I personally find a touch of base boost works for my taste but they clearly can put our more if that's your thing.

The increased base comes in solid, natural, and not bloated. Midrange and highs are balanced and just right for the varied musical styles I listen to (Rock, Jazz, Acoustic). I should also note that I did go with the Black Dragon cable upgrade which adds a touch more clarity/detail over the stock cables which were certainly acceptable.

These IEMs really perform when driving with my MOJO running Tidal HiFi downloads on my iPhone. Makes a great mobile system.
April 5, 2016
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