Thanks for posting your experiments. I've been visiting Mr. Takenaka's site for a couple of years and corresponded with him. Nice and helpful guy.
I too agree that if somebody casted the spiral tube and could sell inexpensively I would buy a pair or two. I think the Bose Acoustice wave implements a similar concept; as for sound quality, well, just ask Herbie.
I think there is a tradeoff where the deeper you go the less "articulation" you get. Takenaka-san must have experimented with varying lengths/diameters until he achieved a balance. Have you asked him about the likely success of your proposed plan?
Keep us posted on your progress.
I too agree that if somebody casted the spiral tube and could sell inexpensively I would buy a pair or two. I think the Bose Acoustice wave implements a similar concept; as for sound quality, well, just ask Herbie.
I think there is a tradeoff where the deeper you go the less "articulation" you get. Takenaka-san must have experimented with varying lengths/diameters until he achieved a balance. Have you asked him about the likely success of your proposed plan?
Keep us posted on your progress.