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- Path: sparky!uunet!usc!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!hobbes.physics.uiowa.edu!news.iastate.edu!pv7426.vincent.iastate.edu!palane
- From: palane@iastate.edu (Paul A. Lane)
- Subject: Re: Liquid Cooled Speakers?
- Message-ID: <palane.727767466@pv7426.vincent.iastate.edu>
- Sender: news@news.iastate.edu (USENET News System)
- Organization: Iowa State University, Ames IA
- References: <136020002@hpcupt1.cup.hp.com> <5070326@hplsla.hp.com>
- Date: Sat, 23 Jan 1993 05:37:46 GMT
- Lines: 29
-
- In <5070326@hplsla.hp.com> kens@hplsla.hp.com (Ken Snyder) writes:
-
- >/ 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.
-
- I have a modest problem with the terminology the manufacturer is using.
- Any system I used that is "liquid cooled" means that I'm forcing liquid
- around devices which produce heat (lasers, magnets, etc.) It appears that
- the manufacturer is using ferrofluid as a heatsink. I may be picking a
- nit, but dubious advertising annoys me.
-
- Paul
-
-