thank you I will disconect the tweeter and hear the midbase and see if it is the problem and hear the tweeter alone with the crossover , how can I fix that problem . I can show you the curve for the midbase and the T/S parameters here
http://www.dobar-zvuk.hr/hi-fi/8home/home_hw_6al.htm
thank you for the post
http://www.dobar-zvuk.hr/hi-fi/8home/home_hw_6al.htm
thank you for the post
Without having even seen the driver / response in question, Zaph has given you a pretty good idea.
Since the woofer's peak is between 4-5KHz, and it is 5+dB - a steeper crossover probably won't be enough at a 3KHz crossover point.
A series notch filter might be what you are after. This is an inductor, capacity and resistor in series, that are then wired parallel to the woofer. www.lalena.com provides some textbook formulas that might get you in the ballpark. However, this could be hit and miss (dependent on the resistance the circuit will see at the frequency - which is not the same as the driver resistance at that frequency). You will probably also change the phase response through the crossover region by adding a LCR filter. So although you might get a flatter frequency response, it may help (or make worse) the phase response.
David.
Since the woofer's peak is between 4-5KHz, and it is 5+dB - a steeper crossover probably won't be enough at a 3KHz crossover point.
A series notch filter might be what you are after. This is an inductor, capacity and resistor in series, that are then wired parallel to the woofer. www.lalena.com provides some textbook formulas that might get you in the ballpark. However, this could be hit and miss (dependent on the resistance the circuit will see at the frequency - which is not the same as the driver resistance at that frequency). You will probably also change the phase response through the crossover region by adding a LCR filter. So although you might get a flatter frequency response, it may help (or make worse) the phase response.
David.
Hi,
If that is an aluminium coned driver, without knowing the writing
speed of the frequency response curve tracer, you do not know
how much smoothing is applied to the response curve.
But for some information see here :
http://www.zaphaudio.com/audio-speaker12.html
And here :
http://www.zaphaudio.com/audio-speaker17.html
Also see here :
http://www.rjbaudio.com/Audiofiles/FRDtools.html
/sreten.
If that is an aluminium coned driver, without knowing the writing
speed of the frequency response curve tracer, you do not know
how much smoothing is applied to the response curve.
But for some information see here :
http://www.zaphaudio.com/audio-speaker12.html
And here :
http://www.zaphaudio.com/audio-speaker17.html
Also see here :
http://www.rjbaudio.com/Audiofiles/FRDtools.html
/sreten.
I have a RLC parallel notch filter on the woofer it is calculated to compensate for that bump and the sibilance is not coming from the woofer because I disconnected the tweeter and heard it then and attenuate the tweeter 3db. The sibilance did not came from the woofer.The woofer has a Zobel
the sibilance is now almoust gone.I dont have any equipment to measure the woofer SPL in the box .
You ware of great help guys , sorry for my english
the sibilance is now almoust gone.I dont have any equipment to measure the woofer SPL in the box .
You ware of great help guys , sorry for my english
zega55 said:Yeah I will try it Sreten it can help do you think I should make a new crossover for all and make a smaller attenuationon the tweeter ?
Hi,
if no baffle step compensation - you need it and larger tweeter attenuation.
/sreten.
zega55 said:Do you have an idea for the crossover and attenuation Sreten can you help please
sreten said:
/sreten.
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