Ferrofluid Enables Audio Speakers to Function More Efficiently

As the global leader in ferrofluid products, Ferrotec has been supplying ferrofluid to audio speaker manufacturers since the early 1970s. Ferrofluid enables audio speakers to function more efficiently, with improved audio response and better power handling. For audio speaker manufacturers, Ferrotec ferrofluid also provides significantly better speaker manufacturability for improved quality and higher manufacturing yields.

Audio ferrofluids are based on two classes of carrier liquid: synthetic hydrocarbons and esters. Both oils possess very low volatility and high thermal stability. The choice of fluid is dictated by the environmental considerations of the application (e.g. humidity, adhesives, contact with water, solvent vapors and reactive gases) combined with the best balance of magnetization and viscosity values to optimize the acoustical performance.

By varying the quantity of magnetic material in a ferrofluid, and by using different carrier liquids, it can be tailored to meet a variety of needs. The saturation magnetization (the maximum value of the magnetic moment per unit volume when all the domains are aligned) is determined by the nature of the suspended magnetic material and by the volumetric loading of the material. The physical and chemical properties such as density and viscosity correspond closely to those of the carrier liquid.

Ferrotec’s highly refined manufacturing process, combined with a long term quality assurance program is the key to its repeatable, reproducible product quality. Our ferrofluid manufacturing facility in Japan is both ISO 9001 and ISO 14001 certified.

APG Series Ferrofluid for Audio Loudspeakers

Improving loudspeaker performance, manufacturability, and reliability.

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EMG Series Experimental Grade Ferrofluid

Ferrofluid for unique, unusual and experimental markets including domain detection, material separation, and bio-medical applications.

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EFH Series Ferrofluid Education for Educational Applications

Ferrotec’s EFH Series ferrofluid is optimized for magnetic demonstrations and school science activities.

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Ferrofluid for Seals

Ferrotec manufacturers all of the premium ferrofluids used in our industry-leading vacuum rotary feedthroughs and seals. These ferrofluids are not available for sale.

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Download our Fluid Worksheet

Ferrotec's loudspeaker information worksheet can help define your audio ferrofluid requirements. Just complete the form and email or fax it to the Audio team at Ferrotec.


Download the loudspeaker fluid worksheet



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A Ferrotec Audio Specialist will contact you with engineering and product information

Do You Need More Information?

For questions about specific ferrofluid series, ferrofluid applications, or to place an order, contact your Ferrotec ferrofluid solutions representative or use the Ferrofluid Inquiry Form.

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