cross over question

bowdown · 10th March 2005, 09:17 AM

Is it possible to use a zobel impedence equalization ciruit and a series notch filter on the same crossover?? If it is possible, how do i implement the zobel and notch filter and the crossover togather. Any help would be great.

Cheers

Bowdown

shusha · 10th March 2005, 09:49 AM

If this is some sort of standard parallel circuit (and it probably is!) you will use zobel on bass and notch on tweeter.

If you need zobel and notch on the same driver (which is less possible) I assume that notch will be placed in front of zobel. First notch in series with driver and then zobel parallel to driver.

bowdown · 10th March 2005, 11:20 AM

Im confused now...... these are the calculators im using and from the diagrams they both look like they are in parallel with the speaker.

http://www.carstereo.com/help/Articles.cfm?id=23

http://www.carstereo.com/help/Articles.cfm?id=36

please help me.........................

Cheers

Bowdown

DonoMan · 10th March 2005, 11:36 AM

Yes, you can. It does not matter which comes first, whether they are series or parallel.

Bill Fitzpatrick · 10th March 2005, 04:20 PM

In this application, the RCL circuit in parallel with the driver should not be called a notch filter.

Anyway, use both as the car stereo site describes.

shusha · 10th March 2005, 08:12 PM

Actually, I haven't respond to this article at caraudio.com because I was a little confused whole afternoon. Now Bill gave me a little courage and somehow confirmed my knowlege about crossover network circuits.

I consider myself an intermediate, certainly not beginner.

Impedance equalizer circuits consists of an resistor and capacitor wired in series together and parallel to driver. It's purpose is to flatten impedance curve of the driver. Imp. eq. are often known as Zobel network.

Notch filter consist usually of an inductor, resistor and capacitor wired parallel together and in series with driver (usually tweeter). The purpose of notch filter is to tame pekas in driver response.

There is also a circuit similar to Imp. eq. with resistor added in series and it's purpose is to flatten imp. curve caused by notch filter itself. This circuit is called notch impedance compensator and it is wired parallel to driver in front of notch filter.

So, as I said I was confused by an article at carstereo which says that notch and zobel are practically the same thing and that notch is like zobel wired parallel to driver.

Am I missing something ??

10th March 2005, 09:17 AM	#1
bowdown diyAudio Member Join Date: Feb 2004 Location: Perth	cross over question Is it possible to use a zobel impedence equalization ciruit and a series notch filter on the same crossover?? If it is possible, how do i implement the zobel and notch filter and the crossover togather. Any help would be great. Cheers Bowdown

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Hi:) and a passive cross-over question	BMWTurbo	Car Audio	7	26th November 2011 12:00 PM
Cross-over question about impedance	Jimmy154	Multi-Way	4	23rd March 2005 01:39 AM
Yet Another Cross-Over Question	abpea	Full Range	4	7th March 2005 08:52 AM
Linkwitz-Riley Cross over question	rs1026	Chip Amps	2	27th August 2004 09:15 PM
No Cross Over!	chris ma	Multi-Way	27	3rd January 2003 01:53 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

10th March 2005, 09:49 AM	#2
shusha diyAudio Member Join Date: Sep 2004 Location: Velika Gorica	If this is some sort of standard parallel circuit (and it probably is!) you will use zobel on bass and notch on tweeter. If you need zobel and notch on the same driver (which is less possible) I assume that notch will be placed in front of zobel. First notch in series with driver and then zobel parallel to driver.

10th March 2005, 11:20 AM	#3
bowdown diyAudio Member Join Date: Feb 2004 Location: Perth	Im confused now...... these are the calculators im using and from the diagrams they both look like they are in parallel with the speaker. http://www.carstereo.com/help/Articles.cfm?id=23 http://www.carstereo.com/help/Articles.cfm?id=36 please help me......................... Cheers Bowdown

10th March 2005, 11:36 AM	#4
DonoMan diyAudio Member Join Date: Feb 2005 Location: Massachusetts	Yes, you can. It does not matter which comes first, whether they are series or parallel.

10th March 2005, 04:20 PM	#5
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	In this application, the RCL circuit in parallel with the driver should not be called a notch filter. Anyway, use both as the car stereo site describes.

10th March 2005, 08:12 PM	#6
shusha diyAudio Member Join Date: Sep 2004 Location: Velika Gorica	Actually, I haven't respond to this article at caraudio.com because I was a little confused whole afternoon. Now Bill gave me a little courage and somehow confirmed my knowlege about crossover network circuits. I consider myself an intermediate, certainly not beginner. Impedance equalizer circuits consists of an resistor and capacitor wired in series together and parallel to driver. It's purpose is to flatten impedance curve of the driver. Imp. eq. are often known as Zobel network. Notch filter consist usually of an inductor, resistor and capacitor wired parallel together and in series with driver (usually tweeter). The purpose of notch filter is to tame pekas in driver response. There is also a circuit similar to Imp. eq. with resistor added in series and it's purpose is to flatten imp. curve caused by notch filter itself. This circuit is called notch impedance compensator and it is wired parallel to driver in front of notch filter. So, as I said I was confused by an article at carstereo which says that notch and zobel are practically the same thing and that notch is like zobel wired parallel to driver. Am I missing something ??

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)