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RE: Why would you invert the polarity of the mid range?

The driver is inverted in relation to the other drivers. Actually, instead of a dip, you'll get a reinforcement at the crossover points. Like many three way designs (the Hales had similar issues), the inverted midrange gives a much steeper crossover slope because of the cancellation to the adjacent drivers. However, I find that getting the timing correct is more important than the slight anomalies in the FR, as you don't always have music playing in the reinforcement band width, which is actually smaller than you may suspect.

IIRC correctly, crossover on the woofer is quite high about 400-500HZ since the midrange has no cabinet to lower the response of the driver. At any rate, it is a simply thing to try, merely a wire swap and easily reversed should the user not like it. On the upper models from Alon, the speakers are tri-wired and so inverting polarity is even easier.

I have sold all the Alon models from the 1's through the 5's, and all exhibit mismatched polarities of the drivers, specifically the midrange. I used to demo them and sell them with the mids reversed. Sold quite a few that way, too.

Stu

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