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From: rs55611@ihuxk.UUCP (Robert E. Schleicher)
Newsgroups: net.audio
Subject: Re: Re: Speaker fusing (particularly wit - (nf)
Message-ID: <856@ihuxk.UUCP>
Date: Fri, 18-Jan-85 13:18:32 EST
Article-I.D.: ihuxk.856
Posted: Fri Jan 18 13:18:32 1985
Date-Received: Sat, 19-Jan-85 01:29:17 EST
References: <37@angband.UUCP> <55100069@trsvax.UUCP>
Organization: AT&T Bell Labs, Naperville, IL
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Maybe someone can comment on this, but it was my impression that with most
modern tweeter designs,  the common cause of failure is not a transient,
but rather thermal damage from sustained high-frequency content.  This is
in contrast to typical woofers, in which the chief cause of damage is excess
cone excursion during transients.  Thus, a single fuse may well protect
both the woofer and tweeter.  When I bought my Advents (6 years ago), they
enclosed a specific fuse recommendation that would prevent thermal damage
to the tweeter (which was the weak point of Advents in their original design;
mine had a ferro-fluid cooled tweeter that was more robust), and presumably
protected against most woofer damage causes.

Thermal damage in tweeters makes a kind of intuitive sense, as with dome
tweeters, or ribbon designs, or EMIT (Infinity), there isn't really a cone
to "pop out", and you're really worried about power levels, not peaks

Also, many "experts" advise that the most potentially damaging music
(for speaker damage) is synthesizer music, which typically has much
more sustained high frequency content.

Bob Schleicher
ihuxk!rs55611