It started due to adventurous spirit of Ninja ( as known on Baby DiyA ) – he found them somewhere on web adds , I believe in Denmark .

As he said – “I don’t know do I need them , but somebody will “ ; due to fact that one is reported as having de-centred bass cone , they were pretty decent price-wise .

Pretty benign pictures , sent to Ninja from seller ; half-luck – just one is having K3809 type sticker , but both are no-back-ribs …… we were hoping in that moment that no-name one is not K3805 (higher Fs , used in Puma cabs) :


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Started as shown here , what was pretty much generic/common Tannoy xover, for Pepperpot WG equipped units.

Now semi finished , still no measurements , only by ear and plenty of deduction , based on numerous web sources . However , it sounds like right step from original values , even still pretty much in Tannoy concept.

One day , hopefully soon , they’ll be finished in principle . Then making no hold barrels version , with ~ 3,8kg of copper for bass and tweet chokes ; maybe even DIY graphite rod resistors 😉 .

Beyma (bass helper) 9.2mH will stay as is – ancient EI core choke , 0.2Rdc .

Still to try air-core (so – no core) autoformer choke for Squawker , hoping that additional 1.5db will bring even more liveliness  .

No pics , just schematic .

xover May-2014


It’s here !

My personal copy , after years of trying to buy it for sane amount of greenies ;

You can still find it ….. in at least dozen web book stores , but just as another book available only in Catalog , not in reality .

Here and there they’re popping up on Ama*on or E*ay , for anything between 30 and 350E , but you need either to be extremely quick or extremely dumb or both , to snatch it.


However , lucky and unworthy as I am , after several years of bawling , I got it … thanks to my own personal Wakoo German , known as Generg on Big Diya .


So , again , another Geschenk von Generg ……..

Vielen Dank , Herr Bethge !

After few quick glances , it seems as interesting reading ; 260+ pages in pretty small font, few dozens of pictures …… and tonight it will be just first of many nice reading nights …….



Tannoy story


 Edit few days later …….. finished very enjoyable reading ……

 What a ride !

Continuo from here ;

Still without measurements , just playing with data from various web sources , LTSpice and bunch of parts


As previously written here : Big Tannoy MLTL for Woland ;

Box design and calc by Mighty ZM , box production by Woland’s local Wood Meister .

Presentation thread , after first listening impressions is at Baby Diyaudio .

For non Serbian-speaking , just use translate function in Chrome , or go to this , already translated , page : Translation .

So – if you can’t have proper horn ……. or OB doesn’t cut for your room or ears , go for MLTL


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