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Multi-Way Conventional loudspeakers with crossovers

small(15l) vented bipole with fe127e, possible?
small(15l) vented bipole with fe127e, possible?
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Old 28th May 2008, 12:06 PM   #1
Brytnardz is offline Brytnardz  Sweden
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Default small(15l) vented bipole with fe127e, possible?

I have this set in mind, to make a mono speaker using the fe127e in a 15l vented bi-pole configuration.

I have read Salas post "TB3 mini bi-pole" as inspiration and it all seems very good to me.

If possible I intend to use this speaker as a portable backpack speaker, so a low weight ratsio and size is of importance.

I have searched this forum for a while now and have not come up with an answer.

please can you help confirm me if I have jumped in the "crazy barrel"?
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Old 29th May 2008, 11:41 AM   #2
Brytnardz is offline Brytnardz  Sweden
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ok ,I know now that it is not possible, so forget this post.
the moderator may take it away......
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Old 1st June 2008, 04:00 AM   #3
knifeinthesink is offline knifeinthesink  Canada
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i dont know anything about this project or the designer but it appears to be what you were looking for.


FOSTEX FE127E SEALED BIPOLE DESIGN

Figure 01 shows the calculated frequency response. For two FE127E drivers, the optimum volume is about 12L

http://diyaudioprojects.com/Speakers.../FE127E_SB.htm
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Old 2nd June 2008, 01:33 PM   #4
gmilitano is offline gmilitano  Canada
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Quote:
Originally posted by kifeinthesink
Figure 01 shows the calculated frequency response. For two FE127E drivers, the optimum volume is about 12L

http://diyaudioprojects.com/Speakers.../FE127E_SB.htm
I should update the text on that project page. 12L is the optimum sealed volume using the Factory supplied T/S parameters. Using the measured parameters, the optimum volume is about 23L.

FYI - Here are my measured T/S parameters for the
Fostex FE127E Fullrange drivers. Also, take a look at this thread about the FE127E T/S parameters.

On the graph, the orange line is the modeled response using the Fostex parameters and the yellow line using the measured parameters.
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Old 8th June 2008, 06:58 AM   #5
Brytnardz is offline Brytnardz  Sweden
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Thanks alot for the replys. This have been most helpful and interesting.
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