Kef B200 Coffin design?

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Some time ago I saw a design for a "Coffin" transmission line bass speaker utilising two Kef SP1022 B200 drivers. I haven't been able to locate it again, can anyone help please?

N.B. I am NOT talking about the B139 version - I know about that.

I would also be interested in any help with a design for a passive crossover supplying < 300 Hz to the B220s (LINK) and via two pairs of speaker binding posts outputting > 200 Hz to two smaller speakers (B110 & T27). The coffin would end up with four pairs of speaker binding posts - two in and two out.

Many thanks in advance.
 
The huge 15mH aircored coils are totally unnecessary.
What would you suggest then?

What would you suggest would be a suitable design for a passive crossover supplying just low frequencies to the B200s and via two pairs of speaker binding posts the remaining middle and upper frequencies to two smaller speakers (B110 & T27). The coffin would end up with four pairs of speaker binding posts - two in and two out.

I notice that the Fried Model H design crosses over at just 100 Hz:
"These are all tied together with an external passive crossover claiming a 1st order network at 100 Hz between the B110 & the B200 (the actual XO map shows a 2nd order low-pass on the woofer)." (LINK)
 
Is there an easy way to convert this to 2 seperate standing enclosures or would that mean a total redesign?

(could split them, downfiring but need room for the mid and tweet too and dunno how downfiring alters stuff unless high enough of floor)

What is the response of this thing anyways?
 
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Here's the link to my Fried Model H page:
https://sites.google.com/site/mpbarney/friedmodelh

The next version of this system consisted of the Model B satellite paired with the Model T woofer (using Dynaudio tweeters and Dalesford mid & woofer).
Model B info here:
https://sites.google.com/site/mpbarneyspeakers/friedbiispeakers
and the Model T Sub:
https://sites.google.com/site/mpbarneyspeakers/friedmodeltsubwoofer

If you're considering biamping, I'd suggest the Dahlquist crossover - passive (single cap only) on the tweeter, third order on the low pass.
Mike Barney
 
Hi All,

FYI:

b🙂
 

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