Finaly. my DIY hand made ZOB speakers are done. I was inspired by Kimpple, and made them with SEAS FA22RCZ driver. Efective cost, and parameters are very close to original Fostex driver.
The front panel is made of two MDF boards with a thickness of 22 mm, glued together. They have 1mm thick walnut veneer. The side walls are made with 25 thick MDF boards. The rest is made of standard HDF board with a thickness of 20 mm. I magnetically shaded the magnet on the driver speaker with an aluminum cover, of course so that the ventilation hole is still accessible, functional. It is, of course, also a design element. There are a few bugs in the original plans, but I managed to deal with them. At first I started without any mute on the speaker. The sound was incredibly open, airy, far more spacious than the room. The disadvantage was the very sharp, midrange-focused sound. On the one hand, I enjoyed microdetails, but I couldn't stand listening for a long time. First I tried damping 3db. It helped gently, but it wasn't permanent. And my Shanling A 2.1 amplifier is weaker at highs than on bass. So I put 6db damping in there, which remains for now. Personally, I would probably accept a damping of 4.5-5db minus. And not so high tones as midrange tones. Bass was now given strength and depth that I didn't even expect. Even trial electronic music has juice. In any case, these boxes are designed for jazz, acoustic, classical or ambient music. Not techno or heavy metal. And in conjunction with an electronic amplifier, they excel. On the other hand, the damping removed the microdetails as well as slightly narrowed the space. It's no longer the ZOB that played more space than my room. Even though it's still the open, accurate, extremely fast and invisible sound. Very similar to the original. The tonality and color of the sound is extremely close to reality. Poor quality recordings are immediately detected. As you can see in the photos, I glued the foam triangles to the back sliding plate. For better attenuation from resonances. The front plate is fastened with screws. Internal cabling using a coaxial Monster cable, 2.5 mm thick. The whole crates stand on conical tips made of brass.
I do not have the technical capacity to make an accurate measurement. What is the frequency response and the like. Sorry for that.
Even if you don't hear them, I hope you like them at least a little. Are you interested in them? I'm here ... although very far from the US.

next one

next one

last one

Thanks Geno... i did my best... :) And today i get happy. One of my member was on listening. He have some Herbert top model, for which he paid as second hand ower 3500€. And he said, that they are shit front of these one, Decware ZOB... :) I feel proud... :)

Thanks..i will check it. Btw, i have to look on the market in EU only.. :/ And as i have fast short reading about that  - it can touch freqencies 8KH to up, what mean, ower midrange... But be shure, is beter ask someone who have it, or here ask Steve, if Gizmo is right way for that...

Hi 4krow. Thanks for the info and advices. I definitely agree, that each driver make huge differenices mostly in midrange and hights. And try any others, it´s about bill and possibility to find them on the market. Some models are already out of production. Some one is crazy expensive. And etc... But true is, that best way is try it by our self. Room, all parts from the system, and personal preferenices in sound, all is very individual. And what is best for one, is not good for other. Even, be close as possible to real natural sound, we will be in one point at all. Than, what it is personal preferencies.... Btw, first i will try leave them burn, for couple of weeks, and than or slow i will think, what i will try to do. In this case is very small change for me big. Use different DAC, different configuration in system and etc... One more time, thanks. BTW: when you use this GIZMO, how saw changed sound, how was touched highst and midrange, or generaly frequencie range/graph? Thnx...

add

You can read about the Gizmo sold by Decware on the 'catalog' page. They do exactly what is described there. I don't have the knowledge to explain it better than the paper written about them. They were originally created for a Fostex driver to control midrange shout but will work on various speakers as well.