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Old 19th July 2003, 03:36 AM   #1
OMNIFEX is offline OMNIFEX  Jamaica
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Default A Simple Question

Hello All


When manufacters give thermal ratings on their spec
sheet, do they feed the speaker xyz watts in an enclosure
or out.
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Old 19th July 2003, 01:01 PM   #2
Ron E is offline Ron E  United States
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Power is typically rated to a standard test

IEC 268-5
DIN 45573

These are "defined shaped noise signal" tests with rolled off bass and they usually test thermal, rather than mechanical limits of the driver. The spec is not very useful unless an enclosure size or a filter slope is specified, since it is not safe to assume.

http://www.phlaudio.com/faq/summary.html has a short explanation
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Old 19th July 2003, 02:24 PM   #3
OMNIFEX is offline OMNIFEX  Jamaica
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Thanks for the link Ron E!

Unfortunately, that didn't answer my question.

I may have to contact a few companies to get my answer.

What I thought was a simple question, may not be as
simple as I thought.

Thanks Anyway!
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Old 19th July 2003, 08:11 PM   #4
Ron E is offline Ron E  United States
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The spec says you must specify the loading enclosure.

That would include no enclosure.
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