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Old 18th February 2009, 03:16 AM   #1
lumstar is offline lumstar  Canada
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Default Speaker Efficiency

So I'm just wondering what defines an efficient speaker? How can I tell how efficient my speakers are? In the D class forum they talk about the fact that a Tripath amp can drive efficient speakers to relatively high volume levels. However, I don't know what defines speaker efficiency.

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Old 18th February 2009, 04:11 AM   #2
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http://en.wikipedia.org/wiki/Loudspe...vs_sensitivity

Something to start you off

Cheers
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Old 18th February 2009, 06:18 AM   #3
chrisb is offline chrisb  Canada
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from above wikipedia citation


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Quote:
An unusual 3-way speaker system. The cabinet is narrow to reduce a diffraction effect called the 'baffle step'.
emphasis mine,


anyone, anyone, .... Bueller?



I read it on the internets, so it must be true
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Old 18th February 2009, 09:23 AM   #4
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Ah, wikipedia. The font of all wisdom & knowledge.
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Old 18th February 2009, 11:02 AM   #5
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I trust that the old boys' club here at the Full Range forum has gone and fixed up the Wikipedia article?

Anyway, sorry for the OT:
In short, efficiency is a quantification of how many dB the speaker puts out with a certain number of watts.

Then, technically unrelated to speaker efficiency, but important in practice, some amplifiers like certain speaker impedances much better than others. Since you mentioned Tripath amps, most of them love 4 Ohm impedances, and only put out half as much power into 8 Ohms.
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Old 18th February 2009, 11:40 AM   #6
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Quote:
Originally posted by Scottmoose
Ah, wikipedia. The font of all wisdom & knowledge.
And still more accurate than most of the printed encyclopedia's out there


Speakers are all about tradeoffs. You can get really high efficiency, usually at the expense of bass and Xmax (linear cone excursion).

A speaker of same dimensions for example rated 95dB will sound just as loud with 1 watt as a common 85dB speaker will at 10 watts. BUT... the 85dB speaker may be able to go to 50Hz, while the 95dB one to 120Hz in the same cab.

Cheers!
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Old 18th February 2009, 01:57 PM   #7
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Quote:
Originally posted by Geek
[B]

And still more accurate than most of the printed encyclopedia's out there
Tell that to the majority of naval historians out there...
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Old 18th February 2009, 03:47 PM   #8
chrisb is offline chrisb  Canada
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Quote:
Originally posted by Scottmoose


Tell that to the majority of naval historians out there...

Is there a doctor in the house?

Hello, doctor - why does it hurt when I pe?
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Old 18th February 2009, 03:47 PM   #9
lumstar is offline lumstar  Canada
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That certainly clears things up! Thanks for the help ppl.
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Old 18th February 2009, 03:59 PM   #10
chrisb is offline chrisb  Canada
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Quote:
Originally posted by lumstar
That certainly clears things up! Thanks for the help ppl.

Actually, on balance there's some good stuff in the article that could be considered a jr high school primer on the subject.
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