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post #1 of 6 Old 07-25-2015, 02:07 PM - Thread Starter
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Crossover calculators and Sub amp plate?

Hi, I would like to know if the crossover calculators are efficient to use. I found a crossover calculator that calculates how much of each component you need in a 2 way system. It can calculate from 1st order to fourth order. Also, let's say that a subwoofer's FS is 28hz and I tuned the box to work at 30hz but the amp plate only has an option to go low as 40hz. Does it mean it plays around that frequency or 40hz and higher? Thanks.

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post #2 of 6 Old Yesterday, 12:30 PM
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the answer is yes, but it can be VERY tricky to actually know what is going on.

many plate amps will have a high pass as well as some "boost" baked in, but it comes alltogether in a single specification called the "q".

for example, a 2nd order highpass at 25hz q=.7 (red) is VERY different than a 2nd order highpass at 25hz q=2.0 (green).


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post #3 of 6 Old Yesterday, 02:12 PM - Thread Starter
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I understand a bit of what your saying but how do you know how much "q"?

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post #4 of 6 Old Today, 10:40 AM - Thread Starter
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Nevermind, I found out that the setting on the subwoofer is just a low pass filter, so if I set it at 40 hz, it just cuts off after. The crossover calculator I'm still unsure of but it makes sense; I found manual calculations which I trust more so yea. Thanks.

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post #5 of 6 Old Today, 02:09 PM
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Crossover calculators and Sub amp plate?

Quote:
Originally Posted by Agash Ugan View Post
Hi, I would like to know if the crossover calculators are efficient to use. I found a crossover calculator that calculates how much of each component you need in a 2 way system. It can calculate from 1st order to fourth order. Also, let's say that a subwoofer's FS is 28hz and I tuned the box to work at 30hz but the amp plate only has an option to go low as 40hz. Does it mean it plays around that frequency or 40hz and higher? Thanks.

What are you using this for? "Textbook" crossover calculators, simple ones you find on web sites, aren't really usable for designing a speaker, as they don't account for the variation in frequency response, impedance, and output of the two drivers.
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post #6 of 6 Unread Today, 06:40 PM - Thread Starter
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I would like to know if I can use it for crossover designing? But, I'm going with manual calculations because it has more stuff included.

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