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Old 20th January 2004, 09:04 AM   #1
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Join Date: Jan 2004
Location: Melbourne, Victoria
Default Basic Electronics and speaker abreviations

Im a total noob when it comes to speakers and was wondering wat the difference between like a 4 ohm speaker and a 8 ohm speaker in terms of sound quality and power.

Also wat are the speaker abrevitations mean and what do they tell about the driver such as free air resonance frequency (fs)
qts, qes, qms etc ...

I am interested in making some speakers for my self and was wondering if there are a few sites that could help with speakers and layouts for subs and 3 way speakers and basic electronics.
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Old 22nd January 2004, 12:35 AM   #2
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Join Date: Dec 2002
Location: Left of the Dial
Here's a page to get you started on some of the basics of Theile/Small parameters.

Here's another.

As far as impedence, 4 or 8 has nothing to do with the power handling of the speaker, or even the quality of the speaker, it is simply something that was decided by the designer. A 4 ohm speaker has the capability to draw more power from the amplifier (note I did NOT say 'handle' more power), which is why low impedence speakers are used in, say, car audio applications where current is plentiful, but voltage is not.

This book, which I'm sure is available in Oz, will tell you pretty much anything and everything you ever wanted to know about speakers, especially if you want to build your own.
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Old 22nd January 2004, 11:36 PM   #3
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Join Date: May 2003
Location: Ft. Worth, TX
Well the Loudspeaker Design Cookbook is a little overwhelming, even for the intiated.

I highly recomend "Great Sound Stereo Speaker Manual" by David Weems, its much more simplified, but gets the the main points across.

I own both of these books (earlier editions) and The former scares the bejeezus out of me, the latter makes it fun
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Old 22nd January 2004, 11:46 PM   #4
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Location: Michigan
Here's a good on-line source that starts you at the beginning.
Rodd Yamashita
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Old 24th January 2004, 06:36 AM   #5
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Join Date: Jan 2004
Location: Melbourne, Victoria
thx 4 that now i will have to buy those bout 140 worth in AUS and bearly any one has it
would there happen to be a pdf version that i can buy or fiond on the net
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