2 way xoover for scan speak 18w4531 and D2904/7100

danyele · 1st May 2008, 11:41 AM

Tweeter

Woofer

For this speackers we have a project for a 2 way xoover?

rabbitz · 1st May 2008, 11:52 AM

This one from Tony Gee is about as close as I've seen.
http://www.humblehomemadehifi.com/Optimo.html

danyele · 1st May 2008, 12:03 PM

The tweeter isn't the same.
It's possible to replace the Optimo tweeter (D2904/7000) with the D2904/7100 without change the xoover?

Inductor · 1st May 2008, 12:20 PM

Quote:

Originally posted by danyele
The tweeter isn't the same.
It's possible to replace the Optimo tweeter (D2904/7000) with the D2904/7100 without change the xoover?

They are very similar indeed. But Tony Gee' it's a TL box with a series xover, if that's what you are looking for. (vs. BR and parallel xovers)

danyele · 1st May 2008, 12:25 PM

Isn't possible to use this xoover with a reflex box?
At the xoover point (2500 hz) the renspose of a woofer in TL or reflex must be the same.

dublin78 · 1st May 2008, 12:51 PM

I have the 18W4531 and the R2904/70000.

I used Tony Gee's Optimo XO in a reflex box. It was not much better that the AOS Studio 35BR that I was not happy with.

I am building the Optimo TL cabinets as we speak. Work and wedding plans are interfering though. I am expecting a totally different result. The TL should add to the midrange quality also.

Old BR cabs:

TL cabs in progress:

rabbitz · 1st May 2008, 12:52 PM

Without modelling it, shouldn't be too far off and might just have to tweak L1, R3, R1. I don't know the difference in behaviour of these tweeters even though the specs look similar.

Should work OK in TL or BR IMO but as with all crossovers, they need final tweaking.

dublin78 · 1st May 2008, 12:58 PM

P.S. If you decide to go down the TL route, and have not bought your tweeters yet, Tony has a XO revision that allows you to use the Vifa XT25TG30-04. Just change R1 to 1Ohm. The Vifa is tons cheaper.

rabbitz · 3rd May 2008, 08:45 AM

dublin78

Without completely redesigning the xo for your BR box, try reducing L2 to 0.56mH or R1 to 3R9 and see what happens to the mids. The inductor change should be more beneficial than the resistor change.

dublin78 · 3rd May 2008, 10:49 AM

Rabbitz: Thanks I will bear that in mind, but I already have a set of AOS designed BR crossovers, as well as a pair of Tony Gee's Optimo crossovers. The bass reflex cabs are already being used with different drivers (with a good result), and I have nearly completed my TL cabs for the Scanspeak drivers. I will let you know the results.

1st May 2008, 11:41 AM	#1
danyele diyAudio Member Join Date: Sep 2006	2 way xoover for scan speak 18w4531 and D2904/7100 Tweeter Woofer For this speackers we have a project for a 2 way xoover?

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
FS: Pair Scan-Speak D2904/7100, (1) AirCirc & (1) AudioTechnology 15H	tf1216	Swap Meet	24	13th July 2009 01:49 PM
Xoover HELP: 2 way D2905/9900 + 18w4531 (Scan Speak Revelator)	danyele	Multi-Way	0	27th January 2007 12:07 PM
Difference between Scan Speak 18w4531 and 18w4831	danyele	Multi-Way	3	9th January 2007 11:28 PM
Look for a pair of Scan-speak 7100 tweeters	tf1216	Swap Meet	4	8th December 2006 10:38 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


	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

1st May 2008, 11:52 AM	#2
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	This one from Tony Gee is about as close as I've seen. http://www.humblehomemadehifi.com/Optimo.html

1st May 2008, 12:03 PM	#3
danyele diyAudio Member Join Date: Sep 2006	The tweeter isn't the same. It's possible to replace the Optimo tweeter (D2904/7000) with the D2904/7100 without change the xoover?

1st May 2008, 12:25 PM	#5
danyele diyAudio Member Join Date: Sep 2006	Isn't possible to use this xoover with a reflex box? At the xoover point (2500 hz) the renspose of a woofer in TL or reflex must be the same.

1st May 2008, 12:51 PM	#6
dublin78 diyAudio Member Join Date: Mar 2006 Location: Cheshire	I have the 18W4531 and the R2904/70000. I used Tony Gee's Optimo XO in a reflex box. It was not much better that the AOS Studio 35BR that I was not happy with. I am building the Optimo TL cabinets as we speak. Work and wedding plans are interfering though. I am expecting a totally different result. The TL should add to the midrange quality also. Old BR cabs: TL cabs in progress:

1st May 2008, 12:52 PM	#7
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Without modelling it, shouldn't be too far off and might just have to tweak L1, R3, R1. I don't know the difference in behaviour of these tweeters even though the specs look similar. Should work OK in TL or BR IMO but as with all crossovers, they need final tweaking.

1st May 2008, 12:58 PM	#8
dublin78 diyAudio Member Join Date: Mar 2006 Location: Cheshire	P.S. If you decide to go down the TL route, and have not bought your tweeters yet, Tony has a XO revision that allows you to use the Vifa XT25TG30-04. Just change R1 to 1Ohm. The Vifa is tons cheaper.

3rd May 2008, 08:45 AM	#9
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	dublin78 Without completely redesigning the xo for your BR box, try reducing L2 to 0.56mH or R1 to 3R9 and see what happens to the mids. The inductor change should be more beneficial than the resistor change.

3rd May 2008, 10:49 AM	#10
dublin78 diyAudio Member Join Date: Mar 2006 Location: Cheshire	Rabbitz: Thanks I will bear that in mind, but I already have a set of AOS designed BR crossovers, as well as a pair of Tony Gee's Optimo crossovers. The bass reflex cabs are already being used with different drivers (with a good result), and I have nearly completed my TL cabs for the Scanspeak drivers. I will let you know the results.

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