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Knowles launches high power micro speaker Cobra™

April 30, 2013

For Immediate Release

Alexander Tarzi
Knowles Sound Solutions
+43 1 60870 1649

New 11x15 mm speaker provides exceptional loudness based on a high power handling capacity and an exclusive silicone membrane

Vienna, Austria, April 30, 2013 – Knowles Sound Solutions, a leading supplier of miniature speakers and receivers, today announced its latest product aimed at acoustic applications in mobile devices, the Cobra™ speaker. The new miniature speaker delivers an unparalleled power handling capacity and a silicone membrane enabling exceptional loudness and robustness in mobile sound designs. Knowles also introduced a version of the component for side-porting applications named Cobra Side-fire™ speaker.

The Cobra™ speaker’s 1 Watt power handling capacity enables outstanding loudness in portable consumer devices, such as feature phones, smartphones, tablet computers and various handheld applications where high quality sound is required. With 94 dB maximum sound pressure level the transducer sets new standards for mobile phone speakers in the industry reference dimension of 11x15 mm, performing about 5 dB louder than conventional components in this footprint.

The Cobra™ speaker features Knowles’ exclusive silicone membrane with high excursion rates and superior robustness. This advanced membrane technology safeguards a long component lifetime at high power settings and enables sound pressure levels at low frequencies resulting in excellent bass performance.

Sound Solutions also introduces the Cobra Side-fire™ speaker, a side-porting version of the Cobra™ speaker with a lateral sound outlet already integrated in the cover of the component. This pre-tested and integrated acoustic solution ports out of the side of the mobile device, enabling thinner application heights and a faster time to market for handset OEMs. Consumers benefit from no muffled sound when holding the phone in their hand or when it is lying on a table.

“With the Cobra™ speaker we’ve developed a robust product that has been optimized for the challenging acoustic requirements in the latest generation of portable multimedia devices,” said Ursula Wutte, Senior Director Business Segment, Knowles Sound Solutions. “The Cobra™ speaker provides the best mix of loudness, bass performance and robustness in the market while the Cobra™ Side-fire speaker is a plug and play acoustic solution that facilitates acoustic designs for device manufacturers”.All trademarks are the property of Knowles Electronics, LLC and/or its affiliates. 

Other key benefits for the Cobraspeaker include:

  • IPx8 waterproof (tested in 1.5 m water for 30 min.) version available
  • High temperature robustness up to 150°Celsius (302° Fahrenheit)
  • Triple magnet technology resulting in a reduced magnetic stray field and limited magnetic dust attraction
  • Impedance of 6 Ohms enables 1 Watt even with standard 2.45 Volt(RMS) chipsets
  • Pre-loaded springs for mechanical robustness and easy handling
  • Fully automated manufacturing enabling consistent high quality in large volumes
  • 100% in-line measurement of all specified acoustical and electrical parameters

Other key benefits for the Cobra Side-firespeaker include:

  • No additional air channels necessary in the acoustic design of the phone
  • Thinner application heights saving up to 2 mm in side-porting applications

About Knowles – Founded in 1946, Knowles Electronics is the leading global supplier of advanced micro-acoustic and human interface solutions, including hearing aid components, MEMS microphones as well as dynamic speakers and receivers. Providing unique technology expertise and a broad product portfolio Knowles serves the markets for hearing health, mobile communications, consumer electronics, and professional audio. Headquartered in Itasca, USA, Knowles has more than 6,000 employees in 17 locations worldwide. For more information visit the Knowles website at

Knowles is owned by the Dover Corporation, a multi-billion dollar diversified producer of innovative equipment, specialty systems and value-added services. Visit for more information.

All trademarks are the property of Knowles Electronics, LLC and/or its affiliates.

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