4 driver focused array

norman bates · 4th December 2009, 07:27 AM

Scottmoose · 4th December 2009, 08:01 AM

Nice.

I see you have additional adjustable damping applied to the top of the cabinet as well...

norman bates · 08:21 AM

lol, ty.

4 x 4" tang band bamboo drivers.

box is 2' tall x 2' wide x 19" deep, open backed, 3" thick foam covering back.

3/4" oak plywood with a 12' focus.

my only issue with it is when you stand up it sounds like your ears instantly plugged up.

Norman

Henkjan · 7th December 2009, 02:26 PM

so if I understand correctly, the drivers are alligned so that they all are focussed on the listning spot, with equal distances thus, and therefore no comb filter effects?

Jozua · 7th December 2009, 05:13 PM

Norman

How does it sound ?

Thx

Jozua

norman bates · 7th December 2009, 11:20 PM

It sounds Wonderfull, given you are the approximate distance away and the approximate distance vertical.

It is open baffle, huge front face, and 4 x 4" drivers (8" driver area) without the whizzer problems.

But my wife really likes it, it sounds good it a limited arc from it (a couch for example).

Henkjan, yes, they are all equal distance to your ears, no combing filtering.

Next up is a 16 x b3s array, 66" tall.

If someone can tolerate the TINY sweet spot, I'd highly recommend it.

Oh yea, if you sit 12' away, make the focus for 14' (gives roughly 4" tall of sweet spot at 12' or so).

It has more high end that my 2 driver setup, I think the reduction in ceiling reflection is the reason, or the reduced excursion, I don't know.

Norman

Henkjan · 8th December 2009, 08:19 AM

so the the sweet spot is not small in sideways direction, is the whole couch OK? I think of making a line array for my HT, so the seating location is rather fixed anyway in distance and height, but varies sideways.

norman bates · 8th December 2009, 08:53 AM

yes, the whole couch OK, remember, it is a 4" driver I use, larger driver = less off axis highs.

Norman

Pit Hinder · 8th December 2009, 09:05 AM

errm...Norman...your loosely coupled damping device loving them...might that mean you ought to do something about resonances?

thunk303 · 8th December 2009, 09:16 AM

Great Work Norman, Did they take you long to put together or was the wood pre-laminated?

I was also wondering how you worked out the curve of the baffle ?

Cheers
Dean

4th December 2009, 07:27 AM	#1
norman bates diyAudio Member Join Date: Nov 2003 Location: iowa	4 driver focused array

4th December 2009, 08:13 AM	#3
norman bates diyAudio Member Join Date: Nov 2003 Location: iowa	lol, ty. 4 x 4" tang band bamboo drivers. box is 2' tall x 2' wide x 19" deep, open backed, 3" thick foam covering back. 3/4" oak plywood with a 12' focus. my only issue with it is when you stand up it sounds like your ears instantly plugged up. Norman Last edited by norman bates; 4th December 2009 at 08:21 AM.

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
TMM driver array question	Puppetnation	Multi-Way	12	14th May 2008 06:03 AM
Line Array with PHY Driver	jpetek	Multi-Way	5	24th February 2008 08:45 AM
Focused (concave) vs. linear line array	GuyPanico	Multi-Way	15	21st June 2006 08:04 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

4th December 2009, 08:01 AM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Nice. I see you have additional adjustable damping applied to the top of the cabinet as well...

7th December 2009, 02:26 PM	#4
Henkjan diyAudio Member Join Date: Jan 2006 Location: Berkel en Rodenrijs	so if I understand correctly, the drivers are alligned so that they all are focussed on the listning spot, with equal distances thus, and therefore no comb filter effects?

7th December 2009, 05:13 PM	#5
Jozua diyAudio Member Join Date: Aug 2003 Location: Cape Town	Norman How does it sound ? Thx Jozua

7th December 2009, 11:20 PM	#6
norman bates diyAudio Member Join Date: Nov 2003 Location: iowa	It sounds Wonderfull, given you are the approximate distance away and the approximate distance vertical. It is open baffle, huge front face, and 4 x 4" drivers (8" driver area) without the whizzer problems. But my wife really likes it, it sounds good it a limited arc from it (a couch for example). Henkjan, yes, they are all equal distance to your ears, no combing filtering. Next up is a 16 x b3s array, 66" tall. If someone can tolerate the TINY sweet spot, I'd highly recommend it. Oh yea, if you sit 12' away, make the focus for 14' (gives roughly 4" tall of sweet spot at 12' or so). It has more high end that my 2 driver setup, I think the reduction in ceiling reflection is the reason, or the reduced excursion, I don't know. Norman

8th December 2009, 08:19 AM	#7
Henkjan diyAudio Member Join Date: Jan 2006 Location: Berkel en Rodenrijs	so the the sweet spot is not small in sideways direction, is the whole couch OK? I think of making a line array for my HT, so the seating location is rather fixed anyway in distance and height, but varies sideways.

8th December 2009, 08:53 AM	#8
norman bates diyAudio Member Join Date: Nov 2003 Location: iowa	yes, the whole couch OK, remember, it is a 4" driver I use, larger driver = less off axis highs. Norman

8th December 2009, 09:05 AM	#9
Pit Hinder diyAudio Member Join Date: Nov 2006 Location: Hannover, Germany	errm...Norman...your loosely coupled damping device loving them...might that mean you ought to do something about resonances?

8th December 2009, 09:16 AM	#10
thunk303 diyAudio Member Join Date: Mar 2005 Location: Australia	Great Work Norman, Did they take you long to put together or was the wood pre-laminated? I was also wondering how you worked out the curve of the baffle ? Cheers Dean

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