Parallel notch filter for Peerless 830869

[Audio>X]

@AllenB
Excluding unintended distortion inherent in many old recordings >
Do you agree that speakers driven at 'medium' level are still the greatest source of distortion in a high quality sound system?

 

[AllenB]

The greatest distortions, you ask? I'd have to say they are linear distortions, not harmonic distortions.

 

[Audio>X]

I believe even order harmonics to be linear, so harmonic distortion IS actually linear.

 

[AllenB]

Linear distortions include delayed secondary signals, comb filtering, acoustic distortions, response issues etc..

 

[454Casull]

Passive parallel notch doesn't seem to be doing the trick for me. Did you use a library block? When I try to either tune it or optimize it, it doesn't seem to do what I want to bring the peak down.

Playing around with it a bit more, the parallel notch filter does seem to provide an impedance peak at the desired frequency, but I can't seem to get any more than about 3-4 dB reduction.

 

[motokok]

What order of slope are you planning to use and at what crossover frequency? You might not even be able to hear that peak anymore depending on the net attenuation by that point, plus with the other driver taking over.

 

[AllenB]

I presume your range of adjustment of the Q of the filter by changing the resistance, has reached it's end. You can reach further by changing the C and L values.

 

[454Casull]

What order of slope are you planning to use and at what crossover frequency? You might not even be able to hear that peak anymore depending on the net attenuation by that point, plus with the other driver taking over.

 

[motokok]

So by 2khz, the woofer will be more than 50db down; I doubt you'd be able to hear any difference!

 

[454Casull]

You are probably right... still, for not too many dollars of components it just seems like piece of mind. Besides, if I use the driver again in a 2-way build then they will become very important 🙂