Old KEF driver options

[scottjoplin]

I've drivers from old KEF Concerto speakers, ie. B139, B110 and T27. There are many designs using them, I'm mostly interested in using small bookshelf designs and using the woofers in separate cabs. Open to all suggestions, thanks

 

[schillg11]

Depending on the version of the B110 SP????, a Kef Reference Series 101 would be my suggestition.


Günni

 

[SubSoniks]

I'm sure your aware of this one but just in case as it's an old BBC classic:

http://uk.kef.com/explore-kef/about-kef/kef-bbc-and-ls35a

I do love those B139's in a big transmission line

 

[Galu]

The B139 suits transmission line loading so that's worth considering.

The 'Coffin' is an interesting dual woofer design!

Dual B139 (Coffin) TL

Coffin TL Plans

 

[scottjoplin]

@ Gunni. Yes, was looking at that, they're SP1003 so CS1A is an option

 

[scottjoplin]

Yes, the LS3/5A is an option too, however it has a rather complex xover, maybe a good candidate for and active/digital xover?

Re TL's, I like them, but the large panel areas scare me a bit, from what I can gather to work well TL's need to be very rigid?

 

[SubSoniks]

I just noticed the use of felt around the T27 on the LS3/5A, BBc must have thought it worthwhile using it to deal with diffraction way back then.

 

[SubSoniks]

I installed a lovely pair of Cambridge Audio R50's into the Ceiriog memorial Institute in Glyn Ceiriog recently that had been gifted to them, there was a diy kit version at one time, not sure who was selling them, possibly and old Wilmslow Audio kit, a friend had a pair back in the 80's, should be some plans floating about somewhere.

 

[SubSoniks]

Yes, the LS3/5A is an option too, however it has a rather complex xover, maybe a good candidate for and active/digital xover?

I have some of the SureDSP modules fitted in place of R/C cards in some old analog crossovers, great little toy's, SigmaDSP can be downloaded and run offline, just have to select the ADAU1701 as the processor to see whats available, you would need two to do 3 way stereo, about £60 inc programmer.

 

[scottjoplin]

Now that's an interesting design, the B110 is TL loaded too, which I read somewhere recently it benefits from

 

[SubSoniks]

Now that's an interesting design, the B110 is TL loaded too, which I read somewhere recently it benefits from

So it is, I hadn't realised that before:


https://www.lencoheaven.net/forum/index.php?topic=10807.0

 

[scottjoplin]

I found this thread Can one build a better (non) LS3/5A speaker based on T27s & B110s? so will probably plough through it.....

 

[Galu]

I can't understand why my suggestion got buried!

 

[midrange]

The Kef Coda 1034. Used the B110 and the T27. It was unlike the ls3/5a in many ways. Wide and shallow, designed for wall mounting, so no BSC. Simple crossover. I seem to remember it being well liked in a multi speaker comparison test in the 70s. Have never heard one myself.

 

[phivates]

Gorilla coffin

 

[audiofan]

I can't understand why my suggestion got buried!

You must be able to make fancy woodworkin & will get a large speaker ..... I dont know many peoples that will accept both....

I use scan speak Kevlar unit in a 17 feet long TLS a nightmare of woodwork ... but I like the sound... lowest reonnance is 7 Hz .....................

 

[scottjoplin]

The Kef Coda 1034. Used the B110 and the T27. It was unlike the ls3/5a in many ways. Wide and shallow, designed for wall mounting, so no BSC. Simple crossover. I seem to remember it being well liked in a multi speaker comparison test in the 70s. Have never heard one myself.

I'm tempted to get the cabinet and crossover from Falcon for LS3/5A, simple solution and I'm lazy . Could always use active 2.1 xover for sub.

Always been fascinated by this too SB1980-3way

 

[Galu]

It would appear that the design of the SB1980-3way dates originally from 1978.

The B110/T27 enclosures are certainly away ahead of their time with their narrow baffle, deep cabinet design.

Must have taken a while to get the 'hang' of mounting them though!