SONNET EAS Audio Processor

Make the most of your hearing with SONNET EAS audio processor, part of the Electric Acoustic Stimulation system. Featuring a stylish design and flexible connectivity options, SONNET EAS fits right in with your lifestyle.

SONNET EAS Audio Processor

The Ideal Choice

Lightweight, water-resistant, and easy to connect: SONNET EAS is an audio processor built for everyday. Its rechargeable batteries are great for power on the go, and of course, it offers great sound too. What's more, SONNET EAS's acoustic unit is specially molded to fit your unique ear.

  • Optimal sound quality
  • Water-resistant design
  • Wireless connectivity
  • Rechargeable batteries
SONNET EAS Automatic Sound Management

Always Adaptable

If you have a busy lifestyle, you can find yourself in many places during the day, such as busy offices and noisy restaurants. SONNET EAS uses ASM 2.0 and dual microphone technology to let you focus in on the conversation, not the background noise. With less time spent manually changing settings, you can just enjoy chatting with family and friends.

Microphone Directionality focuses your hearing by using two microphones to sharpen the sounds in front of you. This gives you better listening, especially in noisy settings.

Wind Noise Reduction minimises continuous wind noise, making it easier to hear in outdoor settings. The wind noise reduction can be adjusted for your specific needs.

Automatic Volume Control continuously monitors your environment and seamlessly adjusts volume levels to ensure every sound is heard clearly and comfortably.

Bring sounds closer
SONNET EAS and AudioStream

Simple Streaming

Use the phone you like, and connect it to the audio processor you love. SONNET EAS makes it easy to listen to your favourite music, and enjoy phone calls with your loved ones in high-quality, true stereo. Just slide the AudioStream cover over your audio processor to enjoy direct wireless streaming from your smartphone or tablet.


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SONNET EAS Battery Power
SONNET EAS battery pack

Power Up

Go all day, and then some more. With a battery life of up to 60 hours, SONNET EAS gives you days of uninterrupted listening. Alternatively, the easy-to-use rechargeable batteries offer a convenient way to power your SONNET EAS.

SONNET EAS Water Resistance

Make a Splash

With SONNET EAS, you can get caught out in the rain! SONNET EAS’s water-resistant design protects it from everyday splashes and moisture. So whether you’re training at the gym, or simply giving the kids a bath, SONNET EAS has got you covered.

And for swimming lessons, beach days, and other underwater activities, the fully-waterproof WaterWear covers will keep your SONNET EAS safe and dry while you enjoy the water. Just remember to remove the EAS earhook and acoustic unit and replace it with a standard SONNET earhook before use.

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For kids

For Kids

SONNET EAS is the ideal choice for little ears. Its tamperproof design, link-check function, and flexible wearing options mean that your active child can experience great hearing on the go.

SONNET EAS colours

Be Bold

Make your SONNET EAS stand out from the crowd. With the different covers available in a wide range of colours, there are hundreds of combinations to choose from.

If you’d rather your SONNET EAS blended in with your hair, try a Design Cover for your DL-Coil cover. With nine different hair tones available, plus plenty of colourful designs, you can find the Design Cover to suit you. 

 Just click below to find your ideal look with our interactive Colour Configurator. 

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Base and Coil
Microphone & Battery Covers
  • Placeholder-AP-StyleBlack
  • Placeholder-AP-StyleWhite
  • Placeholder-AP-StyleNordic Grey
  • Placeholder-AP-StyleBeige
  • Placeholder-AP-StyleAnthracite
  • Placeholder-AP-StyleEbony
  • Placeholder-AP-StyleSienna Brown
  • Placeholder-AP-StyleCool Grey
  • Placeholder-AP-StyleCreme
  • Placeholder-AP-StyleBaby Blue
  • Placeholder-AP-StyleBaby Pink
  • Placeholder-AP-StyleOrange
  • Placeholder-AP-StyleGreen
  • Placeholder-AP-StyleBordeaux Red
  • Placeholder-AP-StylePacific Blue
Additional Coil Covers
Skins for SONNET EAS Audio Processor
SONNET EAS Design Skins

Your Own Style

Want to give your SONNET EAS a makeover? With adhesive skins from DesignSkins, you can change your look in an instant. What’s more, you can also upload your own designs and make your audio processor truly unique.

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Great sound quality is only possible with a great implant. With SYNCHRONY 2 you can benefit from the latest EAS technology and our MRI Guarantee.

But the biggest advantage of SYNCHRONY 2 is that it mimics natural hearing. The result? The closest to natural hearing of any cochlear implant system.

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See why hundreds of thousands of people have entrusted MED-EL with their hearing.

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Find all the information you'll need to care for your SONNET EAS.

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Share experiences with other MED-EL recipients on social media.

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Technical Data

Width: 37.4mm
Height: 67.6mm with Battery Pack Cover Max
Height: 56.7mm with Battery Pack Cover
Height: 51.4mm with Battery Pack Cover Micro
SONNET Audio Processor Size
Thickness: 5.9mm
Thickness: 9.3mm

SONNET Audio Processor

Weight and Dimensions

  • 6.1 g (with ActiveWear)
  • 11.3 g (Me1320 with two 675 zinc-air batteries)
  • DL-Coil: 4.6 g, 32.8 mm x 5.8 mm
  • DL-Coil: 5 magnets available in 9 strengths
  • Durable coil cables available in 3 lengths:
    • 6.5 cm (2.6 in)
    • 9 cm (3.5 in)
    • 28 cm (11.0 in)


  • Processor & Coil: Mixture of polycarbonate and
    acrylonitrile-butadiene-styrol polymer
  • Earhook: Polyamide (PA)
  • Cable: PVC and TPE Evoprene
  • Biocompatible according to ISO 10993-1
  • Latex-free*


  • Compatible with all MED-EL multichannel cochlear implants
  • MAX Programming Interface
  • MAESTRO System Software 6.0 or later
  • Compatible with hearing aids of all brands and types

Product Features

  • Frequency Range 70–8500 Hz
  • Splash-proof design with IP54 rating
  • Dual microphones
  • Datalogging
  • Tamperproof design
    • Secured earhook
    • Locking battery pack
    • Choking hazard avoidance
    • Additional fixation options
    • Locking coil cable (locked to coil and control unit)
  • Link monitoring function with LED indicator
  • Four program positions
  • Continuous volume and sensitivity control with FineTuner or AudioKey 2 app
  • Supports Electric-Acoustic Stimulation (EAS)

Sound Processing Features

Front-End Processing

  • Automatic Sound Management 2.0 (ASM 2.0)
  • Microphone directionality
  • Wind Noise Reduction
  • Automatic Volume Control with Dual-Loop AGC
  • Input Dynamic Range (IDR) of 78 dB

Sound Coding Strategies

  • FS4 (Fine Structure Processing up to 1 kHz on 4 apical channels)
  • FS4-p (Fine Structure Processing up to 1 kHz on 4 apical channels with Intelligent parallel Stimulation for even higher temporal accuracy)
  • FSP (Fine Structure Processing typically up to 350 Hz on 2 apical channels)
  • HD-CIS (High Definition CIS)
  • Biphasic or Triphasic stimulation pulses
  • Supports 250 spectral bands



  • 2.4 GHz wireless communication
  • Direct wireless audio streaming via Bluetooth Low Energy with AudioStream
  • True stereo sound quality
  • Support for bilateral usage
  • Integrated telecoil



  • Dimensions: 68 x 38 x 17.5 mm
  • Weight: 35 g
  • Remote microphone
  • Hands-free phone calls
  • TV streaming
  • Music streaming
  • Direct audio input (DAI)

AudioKey 2 App

  • Remote control functionality
  • Guardian roles
  • Find My Processor
  • Send feedback

FineTuner Echo

  • Dimensions: 104 x 38 x 11 mm
  • Weight: 32 g (including battery)
  • Compact remote control with bi-directional communication
  • ePaper Display
  • Test audio processor microphones
  • SONNET battery status

WaterWear Cover

  • Waterproof up to 4 m depth
  • Can be used in salt, fresh and chlorinated water

Battery Options

Zinc-Air Batteries

  • Up to 60 hours of use with a set of 2 disposable zinc-air 675 batteries

Rechargeable Battery Max

  • Dimensions: 32 x 14 x 7 mm
  • Processor weight with battery: 10.4 g
  • Usage time: Up to 17 hours
  • Charging duration: ~6 hours
  • Charging/discharging: >1800 cycles (80% capacity)**

Rechargeable Battery Standard

  • Dimensions: 22 x 14 x 7 mm
  • Processor weight with battery: 9.1 g
  • Usage time: Up to 10 hours
  • Charging duration: ~4 hours
  • Charging/discharging: >5000 cycles (80% capacity)**

Rechargeable Battery Micro

  • Dimensions: 16 x 14 x 7 mm
  • Processor weight with battery: 8.1 g
  • Usage time: Up to 7 hours
  • Charging duration: ~3 hours
  • Charging/discharging: >5000 cycles (80% capacity)**

Charging Unit

  • 4 simultaneous charging slots
  • Power & charging indicator lights
  • USB powered: 5V DC, 500mA
  • USB power adapter: 100–240V AC (~50/60 Hz)

Please find detailed information and specific conditions for use for each product in the respective instructions for use.
All functions and features may not be available in all markets. Enabling features on the hardware may be subject to technical considerations.

The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by MED-EL is under license.

* Whereby “free” means “not made with latex” according to current FDA guidance: “Recommendations for Labeling Medical Products to Inform Users that the Product or Product Container is not Made with Natural Rubber Latex”, 2014.
** Charging Cycles dependent on individual usage.