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- From: kens@hplsla.hp.com (Ken Snyder)
- Date: Fri, 22 Jan 1993 19:12:33 GMT
- Subject: Re: Liquid Cooled Speakers?
- Message-ID: <5070326@hplsla.hp.com>
- Organization: HP Lake Stevens, WA
- Path: sparky!uunet!elroy.jpl.nasa.gov!swrinde!sdd.hp.com!hp-cv!hp-pcd!hplsla!kens
- Newsgroups: rec.audio
- References: <136020002@hpcupt1.cup.hp.com>
- Lines: 20
-
- / tony@hpcupt1.cup.hp.com (Tony Marriott) / asks:
- > I have some speakers which claim that the tweeters are "liquid
- > cooled". Can anyone out there help me understand what this
- > means and how this effects the sound that the speakers
- > generate? I assume that this process should somehow make the
- > speakers sound better. Or does it just allow the speakers to
- > be more efficient, prolong the life of the speakers, or what?
-
- Many speakers nowadays have what is know as ferrofluid injected
- into the area between the voicecoils and magnet assemblies. This
- normally is an air gap. The ferrofluid is a light oil with small
- magnetic particles in it. It has the advantages of improving the
- magnetic coupling between the magnet structure and voicecoil and
- the thermal coupling as well. (hence the "liquid cooling") In
- reality it can be a good thing. It does, however, change the Q
- and damping of the speaker due to the mechanical reaction it poses
- to movement of the voice coil. It is typically only used in tweeters
- whos voice coil movement is very small.
-
- Ken
-