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Critic's Corner Discuss a review. Provide constructive feedback. Talk to the industry. |
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Critic's Corner Discuss a review. Provide constructive feedback. Talk to the industry. |
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In Reply to: An added complication is the non-linearity of the "Phenomenon of the 'Weak Fundamental' " posted by John Marks on July 21, 2024 at 07:56:50:
Basic rule (for many decades before design software existed) is that the -3dB point of the baffle step is 4,560 divided by baffle width in inches. So for a 15" wide baffle, that will be 304Hz. This certainly can (and should) be refined with measurements and computer modeling, but it gets you in the ballpark at the prototyping stage. In a 3-way design, the correction can be incorporated easily into the woofer-to-mid crossover, by having the lowpass transfer function down -9dB (as opposed to the usual -6dB) at the crossover frequency, and then padding down the midrange output accordingly.
In a 2-way, many designers have had good results with a "staggered" lowpass filter: an initial 3dB shelving filter of paralleled L and R, followed by the higher frequency lowpass to cross to the tweeter. Or by simply adjusting the L to C ratio in a second order (or higher) filter, usually with an oversized L1.
Prototype, measure, listen, adjust, and repeat until satisfied.
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Follow Ups
- You can guesstimate BSC pretty closely without fancy software - Brian H P 13:13:39 07/22/24 (3)
- That seems about right... - Doug Schneider 15:31:55 07/22/24 (2)
- Good explanation of BSC and comp circuit calculators HERE - Brian H P 16:03:16 07/22/24 (1)
- RE: Good explanation of BSC and comp circuit calculators HERE - Doug Schneider 16:31:42 07/22/24 (0)
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