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The heat
generated by the voice coil will be partly transferred to the top plate
of the speaker and the rest by air convection and conduction, which is
not a very efficient process.
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The build up of heat within the voice coil
causes it to expand and can lead ultimately to speaker failure. This
expansion will cause the voice coil to scrape the top plate of the
loudspeaker. By immersing the coil in ferrofluid, heat is conducted away
from the coil much faster, improving the efficiency, and reducing the
likelyhood of speaker failure. The magnetic component of the ferrofluid
prevents the fluid from leaking away from the air gap, whilst the carrier
fluid acts as the medium for heat conduction.
In order to ensure that the fluid remains within the region of the air gap,
it is necessary to produce a fluid which is stable. Liquids Research
Limited produce loudspeaker fluids of very high colloidal stability, which
ensures that the ferrofluid will function correctly during the life-time of
the speaker.
Liquids Research Limited manufacture ferrofluids for the entire range of
loudspeakers, ranging from tweeters to woofers. All fluids are designed to
operate up to 175șC, though to ensure high performance, operation of the
loudspeaker at this temperature for a prolonged period of time should be
avoided. All loudspeaker ferrofluids are manufactured from high quality
synthetic oils and come in a wide range of viscosity and magnetisation. For
an extensive list please download our catalogue.
All
ex-stock fluids are shipped within 24 hours of receipt of a purchase order.
Contact
us by email, phone or fax for a prompt quotation and terms
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