Hi!
I Need some help when setting up my active filter.
The bass/mid are some unknown hifi driver from the -90's and the tweeter is a Scanspeak 9700
By ear i got:
3,04kHz for the bass/mid (LR 24db).
2,85kHz for the tweeter (LR 24db).
Should that value instead be the same? What does the school book says?
I have also put some EQ at 1.09kHz to get rid of a nasty resonance.
Thanks for all advice!
I Need some help when setting up my active filter.
The bass/mid are some unknown hifi driver from the -90's and the tweeter is a Scanspeak 9700
By ear i got:
3,04kHz for the bass/mid (LR 24db).
2,85kHz for the tweeter (LR 24db).
Should that value instead be the same? What does the school book says?
I have also put some EQ at 1.09kHz to get rid of a nasty resonance.
Thanks for all advice!
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After some reading and testing, the value should be the same for the next coming driver, also the resonance disappeared and the algorithm sums up very beautiful one can hear.
LR4 is two cascaded Butterworth (B2) Filters.
The B2 has an F-3dB at the roll-off frequency.
When you use these to create an LR4 the attenuation at the roll-off frequency becomes -3dB + (-3dB) = -6dB
The F-6dB of an LR4 is at the roll off frequency.
It does not help your understanding by determining the F-3dB frequency for this 4pole Filter.
The B2 has an F-3dB at the roll-off frequency.
When you use these to create an LR4 the attenuation at the roll-off frequency becomes -3dB + (-3dB) = -6dB
The F-6dB of an LR4 is at the roll off frequency.
It does not help your understanding by determining the F-3dB frequency for this 4pole Filter.
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