Interesting OB speaker project

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as you say, an interesting idea, but I think not so simple, difficult to get the tuning right and of limited application. When he talks about "the absolute purity of a single driver", - well, I think you'll get lower distortion by going 2 way, and if you're having to built a resonant chamber anyway, you're back to a BR enclosure, with solid bass....
 
Some wild thoughts

Hmm, I wonder if the QM10 by GURU Loudspeakers (http://www.guruproaudio.com/newguru/?page_id=10) uses a similar approach?

The QM10 have a 4" woofer and it is known to produce unbelievable potent bass for its size. (Some opinions : audioasylum , SonicFlare ,.. more on google)

I think I remember from an interview that the designer actually used the term "helmholtz resonator" rather than "vented/ported box". Just speculations... so far :rolleyes:
 
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