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Inductor calculations
Inductor calculations
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Old 12th August 2006, 12:03 PM   #1
jaudio is offline jaudio
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Default Inductor calculations

When using a parallel notch filter, do you add the notch filter resistor to the woofer resistance, when calculating the woofer's inductor value?
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Old 12th August 2006, 01:55 PM   #2
Ron E is offline Ron E  United States
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No.

The notch filter resistor really only acts at the notch frequency, below the notch, the notch inductor and it's DCR dominate, above the notch, the capacitor dominates.

I doubt the notch inductor DCR will affect crossover inductor calculations much.

The sum of the DCR's of the crossover and notch inductor will raise Qes (and Qts) and require a change in box design, though.
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Old 12th August 2006, 09:15 PM   #3
jaudio is offline jaudio
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Thanks for the reply

Sorry I wasnt clear. I was referring to only the resistor in the notch filter and not the dcr on the inductor in the notch filter. I think that resistor would be in series with the woofer, which would add the resistor value (4.6ohm .ei) with the woofer resistance (8 ohm). Now, do I calculate for 12.6 ohm or 8 ohms?
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Old 12th August 2006, 10:21 PM   #4
Ron E is offline Ron E  United States
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I understood you quite clearly. The answer is no. The rest of my reply is FYI-perhaps an unwelcome complication....
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Old 12th August 2006, 10:48 PM   #5
jaudio is offline jaudio
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Quote:
Originally posted by Ron E
The rest of my reply is FYI-perhaps an unwelcome complication....
Your FYI was very welcomed. I didnít understand it at first but I understand a little now. Well, I still donít quite understand it but I can figure it out since I know the answer is definitely no

Thank you for answering my questions
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