It is the point supporting base which processed the hard and strong striped ebony from Southeast Asia into the triangle. Although a triangular vertex serves as a line instead of a point, if it is used for amplifier, a speaker, etc., it controls, and it is stabilized and it can support vibration. The size is [ the bottom ] 18mm in height in 25mmx38mm. Paint etc. was abandoned taking advantage of the merit of a material, and the price was held down low.
PB22 Equipment Stand
There are many cases where a typical metallic resonance sound will be guided from metal spikes. These can playback into the music reproduction in many ways. The PB22 is another solution by Yamamoto, that prevents those resonance sound and become perfectly clear to the ear comfortably.
The use method establishes the squear of 90 degrees of the triangle to etc. 3 pieces or 4 pieces toward the top under the bottom board or foot of the use devices. The direction of the crest line of the top is able to use even which of the front and back direction or right and left direction. It confirms with oneself because there is a difference in the sound subtly by the difference of the direction and please decide. When it makes 2 pieces (or 1 piece) of after opposite direction with 2 pieces of before and also the sound change. Mainly the extent and reverberation of the sound seem to change. Please confirm the use method that fit the device of oneself. Even such a method that piles the same product for 2 steps and make the height of high and also, use 2 pieces and use the squear of 45 degrees toward the top is possible because PB-22 is comparatively low cost. Please try it once!
Specifications:
External form measure: 38 x 25 x 25mm
Height of the base: 18 mm
Max supported weight is 25Kg for 4 pcs.
Material: Southeast Asian Striped ebony (specific gravity about 1.1). This is the same material as used for guitar necks, very musical material, with low resonance.
The Yamamoto Soundcraft Corporation is the HiFi branch of a Japanese machinery company. The large technical possibilities the mother company has, together with Mr. Yamamoto's deep knowledge about materials, and about electronics design has resulted in this wonderful and unique line of products. The special situation here is, that the Yamamoto Soundcraft company does not have to use mechanical parts from other companies. Whatever they need, they make it themself, just the way they want it. Resulting from this is the prestine quality level of the used components.
Until 2003, the company was mainly active in Japan only. With the coming of the internet, and growing interest in tube amplifiers, international sales just "happened" to the Yamamoto company. Until then, the company was mainly known in the Japanese-only tube scene. (which is a scene for itself !) But...the internet changed the way of working. There a lot of awards and articles on Yamamoto products.
Mr. Yamamoto always presented the Audio scene surprizingly beautifull and well-designed HiFi Equipment, made of finest base materials. 
The accessories Mr. Yamamoto designs are genious products, and improve the performance of existing equipment. They are built built to exceptionally high standards: "Handcrafted" as a tag rarely ever signifies this level of bespoke luxury.
Yamamoto Sound Craft makes phono cartridges, head shells for those cartridges, a step up transformer; a phono equalizer amplifier plus a whole lot more. As you can tell Yamamoto-San is a true believer in the joys of vinyl. One of the most demanded Yamamoto accessories is the headshell made from the african ebony wood of the specific gravity 1.4, it is also used for clarinet, oboe, etc. In wood, a clear and forcible sound is the feature because of a very hard and tough material.
--- Shigeki Yamamoto ---
Here, Mr. Yamamoto demonstrates a test record player for the Japanese magazine "Analog". Please don't ask.... it is not for sale. This was only a study, showing the excellent sonic capabilities of the special treated hard wood as used for all products. 
This specially treated cherry wood is called Shashi, and has properties like Ebony wood. So it is the secret tip for Audio products, and of course the #1 choice for the HiFi equipment made by Yamamoto Soundcraft.
Shigeki Yamamoto's professional background includes experience as a high-tech machinist—some of the best and most expensive amplifiers on the planet use his precision-made Teflon tube sockets—and his product gallery is itself a portrait of an audio craftsman with greater-than-average determination: When Yamamoto has an idea for a new kind of capacitor housing—or horn, or moving-coil phono cartridge, or equipment stand, or whatever—he simply gets to work and makes the thing himself. That sort of talent seems out of place in a corporation, or in a field of endeavor that misguided souls have allowed to be dominated by a corporate mentality.
Mr. Yamamoto's music preference is jazz recordings, and he is a very critical listener. His personal experience is, only the finest, natural materials can be used to reproduce the sound in the original way, as it was recorded. For this, no weak elements can be tolerated in the entire sound chain. Only in this way, a true reproduction of the original music will be made possible, with finest details occurring that can not be heard otherwise. This search for originality and perfect materials implicates not only the use of tubes. 
It means every part of the product is subject to a careful selection process. Also the use of hard wood and other natural materials plays an important role in the complete design.
--- The Choice of materials ---
The Japanese Audiophile scene uses only original materials of highest quality and originality, going allways back to the root of the products. There is no interest in new inventions, but allways the search for originality comes first. Japanese tube enthusiasts like to improve products, but never loose the philosophy of the original design. This is how they are. You will find this quality attitude in all traditional Japanese companies like Yamamoto Soundcraft is one. They have a word for this, called Kai-Zen. It means so much as great dreams, small steps.
Piedini Yamamoto PB-22 in ebano
Ho acquistato questi piedini Yamamoto a forma di prisma triangolare in ebano duro per dei diffusori vintage, non riuscivo a trovare nulla che mi piacesse per disaccoppiarli dal pavimento (carbon block, punte, gommini vari...), finalmente ci siamo, non sento il bisogno di modificare nulla nell'impianto da almeno 2 mesi, questo significa che stanno funzionando alla grande, almeno nel mio impianto.
Consigliatissimi.
Recensione
Acquistate più per curiosità (e anche perché si abbinano bene al legno delle mie Tannoy Autograph Mini), e rispetto alle centinaia di opzioni disponibili tra punte coniche, piedini con sfere, basi flottanti, cubetti in pietra lunare (..!), etc., queste piramidi i in sano legno naturale di ebano mi sembrano una interessante alternativa, ad un prezzo più che umano. Le ho fissate ai diffusori con un "velo" invisibile di BluTak, così il fissaggio rimane reversibile senza danni o tracce di colla. Ho seguito la recensione TNT allegata e usate quindi tre punte anziché quattro, attaccando la base della piramidina al diffusore con la punta verso il basso (la recensione dice che sarebbe meglio il contrario , ma la stabilità ne risente troppo). Risultato: 1) il diffusore è assai più stabile perché l'appoggio è basato su una linea retta e non puntiforme come per i coni 2) con una mano appoggiata sulla testa del diffusore in funzione, pare che le vibrazioni siano parzialmente diminuite 3) al tempo stesso, ho avvertito un piccolo miglioramento vs i precedenti coni, in termini di asciuttezza
Un grazie a StereoShop che ha in assortimento sempre articoli validi, inusuali, e a prezzi accessibili (... è consegnati in un lampo)
