1.5 way crossover question

Bill poster · 15th July 2011, 01:17 AM

crossover dunce
If I were to use two identical FR units (per side) and put an inductor on one, that one would be 90 degrees out of phase from the other..is this right?

tuxedocivic · 15th July 2011, 02:29 AM

Not for the whole range, rather changes across some point I believe.

planet10 · 15th July 2011, 03:03 AM

The 0.5 driver will roll thru 90 degrees as it crosses over. Below that it will be in phase

dave

Bill poster · 15th July 2011, 03:55 AM

Thanks guys. so will that mean some kind of cancellation issue?

planet10 · 15th July 2011, 04:00 AM

Yes... somewhat.

dave

Bill poster · 15th July 2011, 10:48 AM

Thanks Dave, I'm not sure what this does to the response (2x chr 70s)- I guess that the 2nd driver x/o shd be set quite low (chr70 has an amount of built in baffle step compensation).
The other route was to have some kind of reflector on one driver (instead of x/o).

tuxedocivic · 15th July 2011, 03:20 PM

I recently saw a suggestion to cover the woofer in felt. Like a thick grill. I thought that was pretty good thinking. They didn't say if they've done it and it worked. But I thought it likely would.

Bill poster · 15th July 2011, 05:44 PM

Felt? not sure how that works
will experiment with both an x/o and the reflector to see what sounds better- started building the 'buck' for the mold; still a month away from finishing the build tho

Squeak · 15th July 2011, 05:59 PM

Pointing the two drivers in different directions would work better I'd imagine.

Bill poster · 06:19 PM

Quote:

Originally Posted by Squeak

Pointing the two drivers in different directions would work better I'd imagine.

Yes, I like Jim Griffins bipole designs

I've stuck with the shape I came up with for the cabinet, with 2 drivers facing forward, so will stubbornly see it through

15th July 2011, 01:17 AM	#1
Bill poster diyAudio Member Join Date: Jun 2008 Location: London	1.5 way crossover question crossover dunce If I were to use two identical FR units (per side) and put an inductor on one, that one would be 90 degrees out of phase from the other..is this right? __________________ Cool Loudspeakers Facebook group http://www.facebook.com/media/set/?s...24506880902633

15th July 2011, 03:03 AM	#3
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	The 0.5 driver will roll thru 90 degrees as it crosses over. Below that it will be in phase dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

15th July 2011, 03:55 AM	#4
Bill poster diyAudio Member Join Date: Jun 2008 Location: London	Thanks guys. so will that mean some kind of cancellation issue? __________________ Cool Loudspeakers Facebook group http://www.facebook.com/media/set/?s...24506880902633

15th July 2011, 04:00 AM	#5
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	Yes... somewhat. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

15th July 2011, 10:48 AM	#6
Bill poster diyAudio Member Join Date: Jun 2008 Location: London	Thanks Dave, I'm not sure what this does to the response (2x chr 70s)- I guess that the 2nd driver x/o shd be set quite low (chr70 has an amount of built in baffle step compensation). The other route was to have some kind of reflector on one driver (instead of x/o). __________________ Cool Loudspeakers Facebook group http://www.facebook.com/media/set/?s...24506880902633


	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

15th July 2011, 02:29 AM	#2
tuxedocivic diyAudio Member Join Date: Jan 2011 Location: Victoria, BC	Not for the whole range, rather changes across some point I believe.

15th July 2011, 03:20 PM	#7
tuxedocivic diyAudio Member Join Date: Jan 2011 Location: Victoria, BC	I recently saw a suggestion to cover the woofer in felt. Like a thick grill. I thought that was pretty good thinking. They didn't say if they've done it and it worked. But I thought it likely would.

15th July 2011, 05:44 PM	#8
Bill poster diyAudio Member Join Date: Jun 2008 Location: London	Felt? not sure how that works will experiment with both an x/o and the reflector to see what sounds better- started building the 'buck' for the mold; still a month away from finishing the build tho __________________ Cool Loudspeakers Facebook group http://www.facebook.com/media/set/?s...24506880902633

15th July 2011, 05:59 PM	#9
Squeak diyAudio Member Join Date: Jul 2007	Pointing the two drivers in different directions would work better I'd imagine.

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

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
Crossover question	anonomouse	Multi-Way	7	3rd July 2011 07:25 PM
do i REALLY need a crossover?? and an amp question. and an ohm question	legendaryfrog	Multi-Way	4	29th October 2006 01:39 AM
Crossover Question	cantskienuf	Multi-Way	4	13th October 2004 09:59 PM
2-way crossover question	dikarner	Multi-Way	3	16th April 2004 05:52 PM

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