Solid body chambering design

[Fernando Esteves]

Hello folk!
I saw Yamaha saying they tune the chambers in their new line of guitars and I know some companies have changed the design of the chambers, like Warmoth. Warmoth is very secretive on their building process, tryed to ask about some things earlier and they said they don't talk about how they build guitars.

Anybody has experience or ideas about creating chambers on a solid body guitar/bass?
Thanks!

[Matthew Lau]

I'm not sure about "tuning" the chambers.

I personally thought that chambering a solid body guitar/bass is about weight reduction.
As long as you have the center i-Beam, it should theoretically be the same as an unchambered instrument.
I think that the main consideration is stiffness of the body.

[Bill Raymond]

You should check the Gibson CEC patent. They have done some chambering to affect the response.

[Jarno Verhoeven]

I typically build electric basses, so any chambering is way to small (short) to be able to do anything in that range. But I am wondering if a soundhole might help if you play the instrument low volume or unplugged. Janek Gwizdala also has them on the side of his medium scale 5-strings.

Still though, I think their size isn't something you can predict, you can try to make a few iterations and see which sounds best, maybe that is what they mean by "tuning".
And indeed, I think stiffness of body and top is the main thing.

[Fernando Esteves]

Thanks for the answers
Not trying to sound louder. Some people does chambered with f holes and the difference is practically zero in volume, but it increases a bit the feedback, IIRC. The idea is to discover if you can change the tone with these chambers, like Yamaha says they does, would be cool if possible.

How do I look a patent? Never saw it

[Bill Raymond]

You can search patents via Google. If I can find it, I’ll post the patent number for the Gibson CE.

[Bill Raymond]

I found the patent doc. On Google patent site: assigned to Norlin, patent number US4450748A.

[Fernando Esteves]

Nice! Thank you