Per PM request, Here are the values for the M74Be twin notch filters posted here earlier in this thread :
26µH // 4.7µF and 26µH // 3.3µF.
Please note that these values will have to be slightly adjusted according to real impedance data of each driver for the max performance.
In general, measure real value of each capacitor, introduce it in VituixCAD, optimize the value of inductor accordingly, wind the coil and adjust the value with a LCR bridge
26µH // 4.7µF and 26µH // 3.3µF.
Please note that these values will have to be slightly adjusted according to real impedance data of each driver for the max performance.
In general, measure real value of each capacitor, introduce it in VituixCAD, optimize the value of inductor accordingly, wind the coil and adjust the value with a LCR bridge
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On many occasions, I added complexity (e.g. notch filter) to my design which sometimes, after blind testing, was found to be beneficial, neutral or detrimental.
The audibility of a resonance, and distortion rise caused by it, is dependent on many factors. Many AES papers document this in great detail.
It would be interesting to know if one can hear the M74B peak in a system when listening to music (not test tones).
If you do find it to be audible, try a passive elliptical LP filter realized by adding a capacitor+resistor across the series inductor of the LP crossover.
The audibility of a resonance, and distortion rise caused by it, is dependent on many factors. Many AES papers document this in great detail.
It would be interesting to know if one can hear the M74B peak in a system when listening to music (not test tones).
If you do find it to be audible, try a passive elliptical LP filter realized by adding a capacitor+resistor across the series inductor of the LP crossover.
By crossing it lower
Btw the breakup paranoia is a little bit unfounded imo, I'm crossing with FIR 48dB/Oct at those frequencies so I'm not sure what is there to gain by those notch filters.
