A Simple Question

OMNIFEX · 19th July 2003, 03:36 AM

Hello All

When manufacters give thermal ratings on their spec
sheet, do they feed the speaker xyz watts in an enclosure
or out.

Ron E · 19th July 2003, 01:01 PM

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

OMNIFEX · 19th July 2003, 02:24 PM

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!

Ron E · 19th July 2003, 08:11 PM

The spec says you must specify the loading enclosure.

That would include no enclosure.

19th July 2003, 03:36 AM	#1
OMNIFEX diyAudio Member Join Date: Mar 2003 Location: Locked Up In The Amp Rack	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. __________________ *OMNIFEX*

19th July 2003, 01:01 PM	#2
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	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 __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. —Aldous Huxley

19th July 2003, 02:24 PM	#3
OMNIFEX diyAudio Member Join Date: Mar 2003 Location: Locked Up In The Amp Rack	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! __________________ *OMNIFEX*

19th July 2003, 08:11 PM	#4
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	The spec says you must specify the loading enclosure. That would include no enclosure. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. —Aldous Huxley

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