How to calculate series notch filters for:
Tweeter Seas Millenium T25CF002 & mid-woofer ScanSpeak 18W/8545-00
This calculator mh-audio.nl - Home gives me:
Tweeter 2.500Hz@5R
R 5R
L 1,12mH
C 3,62uF
Woofer 250Hz@6R6
R 6R6
L 11,2mH
C 36,2uF
I used correctly the minimum impedance & frecuency of each driver datasheet?
Attached both datasheets & the tweeter measured in box without xo
Tweeter Seas Millenium T25CF002 & mid-woofer ScanSpeak 18W/8545-00
This calculator mh-audio.nl - Home gives me:
Tweeter 2.500Hz@5R
R 5R
L 1,12mH
C 3,62uF
Woofer 250Hz@6R6
R 6R6
L 11,2mH
C 36,2uF
I used correctly the minimum impedance & frecuency of each driver datasheet?
Attached both datasheets & the tweeter measured in box without xo
Attachments
Last edited:
Any idea why Troels uses other lcr for the woofer Amish revisted
Last edited:
Any idea why Troels uses other lcr for the woofer Amish revisted
Ask troels. He should respond to a question.
If you only need to flatten the impedance on a tweeter after the resonance then you need a Zobel.
IMHO, if you learn to use a proper crossover software (Speaker Workshop or Passive Crossover Designer), you'll realize that Zobels aren't necessary.
A notch needed to eliminate a bump is quite impossible to do right without measurements.
Troels Gravesen uses LCR notches on woofers mainly to eliminate the bump in the midrange (500Hz-1Kz) due to the baffle step effect. I think it is explained on one of the recent designs (Seas Curv perhaps).
Ralf
IMHO, if you learn to use a proper crossover software (Speaker Workshop or Passive Crossover Designer), you'll realize that Zobels aren't necessary.
A notch needed to eliminate a bump is quite impossible to do right without measurements.
Troels Gravesen uses LCR notches on woofers mainly to eliminate the bump in the midrange (500Hz-1Kz) due to the baffle step effect. I think it is explained on one of the recent designs (Seas Curv perhaps).
Ralf
If the tweeter has a strong impedance peak (no ferrofluid for example), and the slope of the crossover is not steep enough, then you have to. Not doing so the tweeter will exhibit a bump at resonance, and that bump will show up in the FR of the speaker, but this could be a sign of a bad design decision.
Ralf
Ralf
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