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A mix of cs-9 and pl301
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gforse
Junior Contributor 20+


Joined: 25 Jan 2010
Posts: 24

PostPosted: Sat Feb 06, 2010 12:54 am    Post subject: Reply with quote

speakerguru wrote:
gforse wrote:
so the theory of the 107 is .......... its in isobaric so the sound and the bass will go deep......?

No. There's nothing "isobaric" about any KEF coupled cavity. They are bass reflex boxes with the output from the driver blocked off. You only hear the port output. The port output from a reflex has a bandpass response. The upper cut off is often designed to be around 100-150 Hz.


where was the b300 original designed for? and is it best to keep the b300 in a single 90L enclosure? because when i compare the design in bassbox. there's not much of a difference Confused
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audiolabtower
VIP Contributor 500+


Joined: 06 Jan 2009
Posts: 544

PostPosted: Sat Feb 06, 2010 1:04 am    Post subject: Reply with quote

who's talking bollocks? I said that T52s never had ferrofluid, and it was first introduced in T33s, which is surely true?
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Lee in Montreal
Senior Contributor 200+


Joined: 22 Aug 2009
Posts: 203

PostPosted: Sat Feb 06, 2010 2:06 am    Post subject: Reply with quote

gforse wrote:
where was the b300 original designed for? and is it best to keep the b300 in a single 90L enclosure? because when i compare the design in bassbox. there's not much of a difference Confused


Most evryone I kow who designed enclosures using PC softares ended with shitty results. If it were that easy, anybody would end up with top of the line speakers. You'll need to make several speaker systems until you really start feeling the fine art of enclosure design... Really.

As for the B300, it was designed by a member of this forum. The B300 was initially designed for a 90L enclosure, but ended up in a 70L 105/2 because of the marketing department. I made my sealed enclosure at 90L to respect the initial design. I heavily braced it to reduce coloration and not waste energy into vibrating panels. Curved sides keep panels from being "floppy".
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Kef Calinda - since 1979
Kef Cantata - since 2009
Kef 105/2 - since 2009
Evo 105/2 - in the build
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gforse
Junior Contributor 20+


Joined: 25 Jan 2010
Posts: 24

PostPosted: Mon Feb 22, 2010 10:13 pm    Post subject: Reply with quote

I think I go for the 90L enclosure with bracing bud also with sand filled side walls and good bracing! because I think its the best for the B300. and I like the lines you have in your design Lee. bud I will make it different!

Bud how do you calculate the round edges and the bracing? also if you isolate than you also get a bigger dimension how can I calculate that?

i read some where you must do the original enclosure of 90L times 1.25 so you have the isolation calculated?
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