speaker's BL parameter

MisterTwister · 23rd January 2008, 10:37 PM

does BL force factor parameter provide any useful information about speaker's performance? I noticed that high-end pro woofers have higher BL, and their sound is often described as more dynamic.
does it mean higher the BL the more dynamic driver is? or there is no direct relation.

Svante · 23rd January 2008, 11:12 PM

BL is simply the amount of force on the cone you get for a certain current through the voice coil. A higher Bl will make the driver play louder (but not necessarily cleaner) and it will also indirectly lower Qes and Qts.

Bl has to be viewed together with Re since it has the opposite effect. That is why the ratio Bl/sqrt(Re) is sometimes found in datasheets.

Thawach · 24th January 2008, 04:38 PM

Hi svante

Thia picture that i have ever seen. What do you think about this?

They want the spl or not?

regards
Thawach

______________________________________

The cheap materials and good engineering. Please believe
it's the garbages from good engineer. a salesman.

Thawach · 26th January 2008, 07:03 PM

Hi svante

I ask you at 2007. and here is 2008. (about 1 year)

I cannot get the answer from you.

Are you sleeping? woo!

regards

Svante · 26th January 2008, 08:54 PM

Hmm, I am afraid I don't understand the question.

Thawach · 27th January 2008, 09:58 AM

Hi svante

I would like to know that they make it for?

If you are not answer me. I will download The adge and Basta

to use.

2009?

Thanks

AndrewT · 27th January 2008, 10:58 AM

Can a member from Thailand help Thawach rephrase the question/s?

ßart West-VL. · 27th January 2008, 11:12 AM

I think the question from Thawach is, "What is the driver meant for, high spl?"

Bart

Thawach · 27th January 2008, 12:03 PM

Hi

i want to know that it's difference from single magnet.

I see the picture . it has magnet to join=3.

the gap is long. i would like to know what the parameter change?

is it good idea?

regards

Zoran · 27th January 2008, 02:42 PM

BL=B x L (Tesla x meter)
where
B = strenght of magnetic field
L = lenght of voice coil vire

23rd January 2008, 10:37 PM	#1
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	speaker's BL parameter does BL force factor parameter provide any useful information about speaker's performance? I noticed that high-end pro woofers have higher BL, and their sound is often described as more dynamic. does it mean higher the BL the more dynamic driver is? or there is no direct relation.

23rd January 2008, 11:12 PM	#2
Svante diyAudio Member Join Date: Feb 2004 Location: Stockholm	BL is simply the amount of force on the cone you get for a certain current through the voice coil. A higher Bl will make the driver play louder (but not necessarily cleaner) and it will also indirectly lower Qes and Qts. Bl has to be viewed together with Re since it has the opposite effect. That is why the ratio Bl/sqrt(Re) is sometimes found in datasheets. __________________ Simulate loudspeakers: Basta! Simulate the baffle step: The Edge

26th January 2008, 08:54 PM	#5
Svante diyAudio Member Join Date: Feb 2004 Location: Stockholm	Hmm, I am afraid I don't understand the question. __________________ Simulate loudspeakers: Basta! Simulate the baffle step: The Edge

27th January 2008, 10:58 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Can a member from Thailand help Thawach rephrase the question/s? __________________ regards Andrew T.

27th January 2008, 02:42 PM	#10
Zoran diyAudio Member Join Date: Jan 2004 Location: Belgrade	BL=B x L (Tesla x meter) where B = strenght of magnetic field L = lenght of voice coil vire __________________ ###


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26th January 2008, 07:03 PM	#4
Thawach diyAudio Member Join Date: Dec 2007	Hi svante I ask you at 2007. and here is 2008. (about 1 year) I cannot get the answer from you. Are you sleeping? woo! regards

27th January 2008, 09:58 AM	#6
Thawach diyAudio Member Join Date: Dec 2007	Hi svante I would like to know that they make it for? If you are not answer me. I will download The adge and Basta to use. 2009? Thanks

27th January 2008, 11:12 AM	#8
ßart West-VL. diyAudio Member Join Date: Jun 2005 Location: West Vlaanderen	I think the question from Thawach is, "What is the driver meant for, high spl?" Bart

27th January 2008, 12:03 PM	#9
Thawach diyAudio Member Join Date: Dec 2007	Hi i want to know that it's difference from single magnet. I see the picture . it has magnet to join=3. the gap is long. i would like to know what the parameter change? is it good idea? regards

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