Oh, I just could listen to them in you-tube, there are no such basses in our city

So I love both Hexabuzz and Fbass AC6 and BNF6. But still can't find here Hexabuzz with 19 mm string spacing.
Hello Everyone, pleasure to be here.
Hello Oleg,
I have just received my Hexabuzz 17,5 mm last Friday so can judge the sound. Completelly agree with those who said this is the world class instrument. Several first biggest impressions:
- great playability due to very very low action along entire neck, very easy to play long hours as left hand does not get tired; At the same time the bass craftmanship is so high that very low action does not harm the sustain (very long) or sound volume (quite loud).
- 95% even sound response along and crossing entire neck, meaning ALL 6 strings sound equally loud along the neck. Separatelly underline that low B - no compromises on sound - lound and tone same big thing as other five. I'd say no difference between as some say A (commonly the best sounding string) and low B on my Hexa.
- due to the epoxy finish on fingerboard 80% as hard as glass The Bass gives fantastic sound. It sounds like concert grand piano or the double bass with bow, or both together around middle of the neck on G, D, A, E. B and C do not give such a real buzz, but I will try to lower the action. I expect this will make B and C buzzing more.
The reason why The Bass produces this sound is while a strings while pressed at fingerboard not only sounds as normal string but also makes a buzz at the neck with its approx. 3-5 cm. part below (in distance) the fretting finger. So the sound comes from combinations of 2: one is normal bass string sound, another one is this amazing buzzing on neck. Both together = one sound - in reality sounds like a little flanger effect, with some extra treble added. Or same sound copied, delayed for several ms and mixed with dry with yet treble frequencies sintesized into the mix. The sound is similar to the one of a bow makes at upright or violin. Besides go and look for Jeff Schmidt on youtube. His pieces on Pentabuzz, especially ones usin tapping. You will hear this very special buzzing sound. However this still not enough to understand this in reality because Youtube is sound lossy, and we speak on very delicate sound nuances.
But this explanation is not what you can understand when you hear the bass. What you hear is the quality and nature of the sound is very different to other basses.
Must say this specific buzz sound is not the only available. With Hexa preamp you can make it normally doom, punchy, biting, etc. - so all high quality bass sounds are availble. Just pan to neck pickup or between, lower trebles and get common bass sound.
I haven't listened to BNF6 or AC6 in reality (if we speak about fretless, AC6 is fretted by standard if I am not mistaken). I suppose the difference at least will come from non-coated fingerboard and non-neck-through (well they do neck through but I understood bolt-on is standard, please check yourself). I would go and dig through Fbass club here on TB to find the explanations what they sound like and then decide what sound is. And maybe posted same question as here.
Go and see Pentabuzz or Buzz on harmonycentral reviews. There are some.
You can PM me if you have other questions.
Hope this is useful for you.
Regards,
Val
PS. One important comment. I believe Penat/HexaBuzz is very solid solo concert instrument of great level. My opnion if this is to be used as normal bass = rythm section instument in a band there is no room for Buzz unique sound to be heard by audience.