Ringing midrange

JP Haggar · 17th April 2006, 07:42 AM

How to tweek a crossover to suppress ringing tones in the 400 to 800 HZ. My speaker is a 3 way 2nd order xover at 250 and 2500 Hz. components are SS 2905/9500 Tweeter, Vifa PL 14 Mid and SS 8555-00 bass, I've tried to change the mid driver with focal W 4211 or SS Kevlar but it only made it worse , especially the voices and the higher piano notes . I'm a beginner really in need of advise . The software I use is Xover Pro !
Thanks
JP Haggar

pinkmouse · 17th April 2006, 08:40 AM

You need a frequency response plot to see the extent of the problem before you can design anything to sort it out.

tinitus · 17th April 2006, 09:53 AM

You can try and ad some resistors to paralel components in crossover - and I think you need an RC on bass

lndm · 17th April 2006, 10:04 AM

I looked at Xover Pro's web page and as far as I can tell, it does not incorporate the measured frequency response of the drivers. This is referred to as a 'feature'. In fact, this limitation (if I didn't misread the page) will not recognise cone breakup and as you're no doubt aware, cone breakup is a larger issue in crossover design.

tinitus · 17th April 2006, 11:18 AM

Looking at woofer - it does have cone break up like it was a metalcone

tinitus · 17th April 2006, 12:53 PM

Sorry to reply so fast again - you refer to ringing as being in the 400 to 800hz region - so I suspect you hear it on saxofone low midvoice and deeper strings on violins etc. - if so I am almost certain it is a crossover malfunktion - maybe phase problems - the lowest crossover point is very difficult to get right.

lndm · 17th April 2006, 01:04 PM

I have a hump at around 800Hz and I use an RLC string in parallel with the woofer. It works well but is difficult to design without crossover simulation as results are often touchy and/or unpredictable.

JP Haggar · 17th April 2006, 02:33 PM

Thanks guys , will certainly get something out of your advise ,
will keep you posted as to my results.
JP

17th April 2006, 08:40 AM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	You need a frequency response plot to see the extent of the problem before you can design anything to sort it out. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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17th April 2006, 09:53 AM	#3
tinitus diyAudio Moderator Join Date: Nov 2005	You can try and ad some resistors to paralel components in crossover - and I think you need an RC on bass

17th April 2006, 10:04 AM	#4
lndm diyAudio Member Join Date: Mar 2006 Location: nsw	I looked at Xover Pro's web page and as far as I can tell, it does not incorporate the measured frequency response of the drivers. This is referred to as a 'feature'. In fact, this limitation (if I didn't misread the page) will not recognise cone breakup and as you're no doubt aware, cone breakup is a larger issue in crossover design.

17th April 2006, 11:18 AM	#5
tinitus diyAudio Moderator Join Date: Nov 2005	Looking at woofer - it does have cone break up like it was a metalcone

17th April 2006, 12:53 PM	#6
tinitus diyAudio Moderator Join Date: Nov 2005	Sorry to reply so fast again - you refer to ringing as being in the 400 to 800hz region - so I suspect you hear it on saxofone low midvoice and deeper strings on violins etc. - if so I am almost certain it is a crossover malfunktion - maybe phase problems - the lowest crossover point is very difficult to get right.

17th April 2006, 01:04 PM	#7
lndm diyAudio Member Join Date: Mar 2006 Location: nsw	I have a hump at around 800Hz and I use an RLC string in parallel with the woofer. It works well but is difficult to design without crossover simulation as results are often touchy and/or unpredictable.

17th April 2006, 02:33 PM	#8
JP Haggar diyAudio Member Join Date: Apr 2006 Location: Canada	Thanks guys , will certainly get something out of your advise , will keep you posted as to my results. JP

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