Torben Sondergaard said he would forward the request to engineering. There seems to be a lot of interest in this kind of driver right now, so maybe we'll see a handful of manufacturers making them in the next year or so.

I've changed my focus to a push-pull horn design, so I'm not as interested in the shorting ring woofer anymore. I mean, I always liked the sound better, so I'd love to see them made. But the push-pull arrangement does the same thing. You have to have two drivers, so for a small speaker, the shorting ring is still very attractive. But for a horn with two woofers, I'm looking at a few other things right now.

An improved woofer can be used in a push-pull design, but the beauty is that it cancels harmonics so it actually matters less how symmetrical the driver movement is. I think it may prove to cancel harmonics at lower frequencies too. I'm just now starting to get things ready for testing. So we'll see.

Wayne