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Multi-Way Conventional loudspeakers with crossovers

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Old 26th March 2009, 04:05 PM   #1
delsix is offline delsix  United Kingdom
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Default Mistery loudspeakers

Hi, Ive been given a pair of speakers and was wondering if anyone had any idea what they are.

The only info on them is a pair of serial numbers:- 1066 Left & 1067 right.


I've pulled a midrange out, it has the serial number 796607 or maybe 79g607. The surround has completely withered but if I push the centre it moves in and very smoothly. So I reckon it can be easily mended if it's worthwhile.

So anybody got a clue what they are?
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Old 26th March 2009, 04:06 PM   #2
delsix is offline delsix  United Kingdom
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another picture
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Old 26th March 2009, 04:09 PM   #3
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another picture
Haven't yet got the speakers into my basement, so will maybe find more info when I open them up.
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Old 26th March 2009, 05:01 PM   #4
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Well, you have a KEF B139 woofer, and the small cones look like Peerless. Is the enclosure on the smaller cone driver attached or a separate piece?
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Old 26th March 2009, 05:36 PM   #5
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thanks for the reply.

It's attached, see picture.
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Old 26th March 2009, 06:48 PM   #6
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Yes, Peerless. A number of speakers used that one. Dalquest DQ 10 is an example. Sequerra 1 is another.
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Old 26th March 2009, 06:58 PM   #7
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wow, it looks they these drivers have graced some pretty impressive speakers over the years. I'm picking them up in a bit so I'll be able to investigate further.
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Old 26th March 2009, 07:02 PM   #8
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The Sequerra packed the exterior of the plastic enclosure with calk or putty to dampen it. They also removed the dust cap and put a phase plug in it's place.
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Old 26th March 2009, 07:46 PM   #9
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Kef B139, still a usable bass driver.... often used in a TL.

http://t-linespeakers.org/drivers/b139.html

Scott & i revisted the B139 TL using modern modeling tools. (2 possible configs shown at the link, but it could be done other ways).

http://t-linespeakers.org/projects/vProjects.html

Modrange is the closed back Peerless K040, used in quite a few speakers including some of the less expensive IMFs and the 2nd iteration of the Rogers Pro9TL

The tweeter -- can you post a closeup of the front and the back?

The XO is classic British. Someone common must have been making XOs for a lot of manufacturers.

The B139 is worth reusing... the tweeters in some "i need a tweeter, ant tweeter" application, and the XO for parts (mostly the chokes -- modern caps are much better)

dave
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Old 26th March 2009, 07:49 PM   #10
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will do when i pick them up later
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