| Re: I guess I kinda messed up! [message #70448 is a reply to message #70447] |
Tue, 13 December 2011 13:50   |
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Wayne Parham
Messages: 18786
Registered: January 2001
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Illuminati (33rd Degree) |
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That change actually does something very subtle and can be considered "perfectionist mode". It shifts the forward lobe upwards about 5°. The crossover point doesn't change, and response - at the center of the lobe - doesn't change either. But it does shift the position of the forward lobe in the crossover region, and as a consequence, this also shifts the vertical nulls.
With a 20uF capacitor C4, the nulls are about +15° and -25°, meaning the top null is about 15° above the baffle normal (straight forward) and the bottom null is about 25° below the baffle normal. With a 10uF capacitor C4, the forward lobe is nicely centered, with vertical nulls at +/-20°. It's not a huge change, but it does make enough a difference I thought it was worth doing. You'll hear the difference if you're standing up, listening fairly high above the centerline.
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