Interesting new fullrange drivers out of Japan

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Silly me! I forgot that a file could be attached directly.

Can it be seen on screeen now?

Christopher Witmer
Tokyo

P. S. Note that there is a slight consumption of amplifier power by the circuit; however, the net decrease is not as much as might be expected, since power is being "recycled" from each coil back to the other coil. The more efficient models still achieve acoustic output over 100dB/W/1m . . . not bad for a 16cm driver.
 
Even sillier me . . .
 

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Well, if there is a higher efficiency 16cm fullrange than the best of this line, I'd like to see it. With better than 100dB/W/1m efficiency, the dynamics are astounding. If anything, the servo control helps the dynamics: think of it as a sports car with not only a powerful engine but also excellent brakes. Come to think of it, the analogy to a sports car might is pretty good. This is Japan's answer to handmade Italian sports cars. Thankfully (unlike Italian sports cars) once these drivers are finished they last forever if you don't abuse them. (The edges are made of leather.)
 
Hello cdwitmer, do you have information about the inductivities in the passive servo control? Especially transforming factor would be interesting. I am considering a similar circuit for dual voice coil woofers.

Regards, Oliver
 
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