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Re: Won't a simple lens help merge DDS-90 to larger woofer?

Posted by Duke (D) on February 25, 2007 at 23:35:41

In Reply to: Won't a simple lens help merge DDS-90 to larger woofer? posted by freddyi on February 25, 2007 at 05:20:00:

Hi Freddyi,

Thanks for the shipping! That was very thoughtful of you.

I've never used a diffraction slot in front of a woofer before, so don't know first-hand what the audible pluses and minuses are. I like the pattern widening aspect, but am leery of adding diffraction - which causes coloration not by messing up the frequency response, but by adding a secondary (distorted) signal that arrives later in time than the original signal and therefore is not masked by the ear/brain system.

Frankly my inclination would be to use the 15 without the slot. Sure there's a minor radiation pattern mismatch in the crossover region, but it's not nearly as bad as most speakers have.

Now maybe a Karlson-like slot would give the best of both worlds. I think it would spread out the diffraction over time so that it doesn't present a strong, distinct impulse. Hmmmm. Seems to me somebody on this board mentioned something about Karlsons a while back...

Cheers,

Duke

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