Help with filter for dipoles

Mayday · 14th April 2007, 06:47 PM

Some time ago I built fullrange dipoles using Dayton 15" IB, seas P17RCY and NEO8.
15" lp with 48dB at 30hz and hp with 48dB at 290hz(active crossover)
Seas lp with 6db at 290 and hp with 6dB at 1400hz(passive)
Neo8 lp with 6dB at 1400hz(passive)

Now I'm going to replace the seas 6,5" with Dayton RS-108S-8 7"
I've been told that I can't use the same crossovers as now due to ringing from the Dayton 7" at around 6000hz.

Would this 12dB crossover at 1000hz work for the dayton 7" and the Neo8?

owdi · 15th April 2007, 12:50 AM

I think that filter would be good enough, especially if you also compensate for the rising impedance of the RS180. Try modeling the crossover using the FRD Consortium Passive Crossover Designer, to see if the cone breakup is attenuated sufficiently.

How about a 1st order slope combined with two notch filters? Simulation Results: Dayton RS180 / Seas 27TBFC 2-way Bookshelf

Dan

Mayday · 15th April 2007, 02:13 PM

Thanks!
How would I compensate for rising impedance of the dayton 7" ?

14th April 2007, 06:47 PM	#1
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	Help with filter for dipoles Some time ago I built fullrange dipoles using Dayton 15" IB, seas P17RCY and NEO8. 15" lp with 48dB at 30hz and hp with 48dB at 290hz(active crossover) Seas lp with 6db at 290 and hp with 6dB at 1400hz(passive) Neo8 lp with 6dB at 1400hz(passive) Now I'm going to replace the seas 6,5" with Dayton RS-108S-8 7" I've been told that I can't use the same crossovers as now due to ringing from the Dayton 7" at around 6000hz. Would this 12dB crossover at 1000hz work for the dayton 7" and the Neo8? __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

15th April 2007, 02:13 PM	#3
Mayday diyAudio Member Join Date: Mar 2004 Location: Sweden	Thanks! How would I compensate for rising impedance of the dayton 7" ? __________________ The more you learn, the more you realize how little you know... Mayday DIY blogg

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15th April 2007, 12:50 AM	#2
owdi diyAudio Member Join Date: Sep 2003 Location: Bellevue, WA	I think that filter would be good enough, especially if you also compensate for the rising impedance of the RS180. Try modeling the crossover using the FRD Consortium Passive Crossover Designer, to see if the cone breakup is attenuated sufficiently. How about a 1st order slope combined with two notch filters? Simulation Results: Dayton RS180 / Seas 27TBFC 2-way Bookshelf Dan

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