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My B139 sound dry and congested in 43 liter enclosures
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proffski
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Joined: 22 Aug 2003
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Location: Tewkesbury UK

PostPosted: Sat May 04, 2013 7:11 pm    Post subject: B139 Variants? Reply with quote

This will add to the confusion then...
Link: http://www.mickandviv.com/isobarik-faq/DriversB139.htm
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speakerguru
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Joined: 18 Nov 2005
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Location: Green Hut, Tovil

PostPosted: Sun May 05, 2013 9:16 am    Post subject: Re: B139 in closed box Reply with quote

RGBE wrote:
[quote proffsky]I see that the C80 had an internal volume of 47L using the B139 SP1212 driver.
C80: http://listeninn.com/Website/Used-Speakers/KEF-C80-Info.htm


I would be very happy to know that the C80 volume was 47 liters -very close to my 43 l- if the B139s SP1212 had the same acoustical characteristics of my SP1044s. Do you think they are equal in the acoustic aspects?[/quote]

Yes, they would have been very similar. Changing the voice coil impedance makes very minor changes to the "Theile-Small" parameters apart from scaling everything for impedance.
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RGBE
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PostPosted: Sun May 05, 2013 1:36 pm    Post subject: Re: B139 Variants? Reply with quote

proffski wrote:
This will add to the confusion then....


Oh my God!
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RGBE
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Joined: 22 Sep 2006
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Location: Sevilla, Spain

PostPosted: Sun May 05, 2013 7:01 pm    Post subject: Re: B139 in closed box Reply with quote

speakerguru wrote:
Yes, they would have been very similar. Changing the voice coil impedance makes very minor changes to the "Theile-Small" parameters apart from scaling everything for impedance.

Then, may be, I shall leave my 43 liter IB enclosures as they are and, perhaps, add a good subwoofer. I have a spare B139 ready for it.

But, before, I shall give them a good hearing as I have not listened to these speakers for several years and don't remember well their bass character.
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