Tang Band W2-803SM, fullrange box suggestions? - Page 2

Bjohannesen · 27th April 2012, 07:48 AM

Hi AggroMagnet,

what I know something about is MJK´s models, which are accurate and advanced in terms of parameters used to predict the result.

I have enclosed my prelimenary working paper. I will do some more simulations the coming days. Once I have the physical shape of the cabinet, I will simulate baffle step circuit - which is also done in MJK´s models.

Hi from
Bjorn J

AggroMagnet · 6th May 2012, 01:15 PM

Quote:

Originally Posted by AggroMagnet

Woodwork and painting will be done this weekend

Lol @ the optimist..

Has at least made some progress. Ports final tune ended at 79Hz (again, according to WinISD)
Having it tuned to 79 vs. 95 didn't seem to make much of a difference in real life though. This again could have something to do with the stuffing..
The top is now stuffed comletely, and dampening on all of the back wall.
This was necessary to get rid of the hollow midrange mentioned earlier, but has dampened the bass a bit.
Made new bottom plates optimized for corners, they seem to prefer that location

Here sitting next to some B&W 686 5" to illustrate size

AggroMagnet · 26th May 2012, 06:45 PM

Almost done

And some live action (low quality..): VIDEO

krakatoa · 26th May 2012, 07:12 PM

There was allot of "action" going on bellow 100hz, the lowest sound I measured for sure from the video was a strong 65hz (guitar) "woom". Impressive!

AggroMagnet · 26th May 2012, 07:30 PM

It would be a shame to use a high pass filter on them, wouldn't it?

I hope to get some better recording equipment soon..

Bjohannesen · 29th May 2012, 08:44 PM

Nice indeed

Which shape /geometry did you end up with. The fine end result looks different from your original drawing.
I havent startet building my version, despite i have the drives in house, but your video really inspired me to speed up.

AggroMagnet · 29th May 2012, 09:50 PM

Good to hear

Tried with a different camera today, a bit less noise:
Tangband 2 inch fullrange speakers - YouTube

Internal dimensions same as earlier, 895x80x89mm.
Port size 80x8mm with 35mm length, tuned for 78hz.
Box is otherwise empty, not counting the stuffing.
Had to make that goofy foot to stabilize them a bit..

Bjohannesen · 30th May 2012, 06:50 AM

My version is tuned to about 75 Hz, same as yours, so I expect a good result as well.

I have enclosed the dimensions of the cabinet I will build. The volume is large for this driver, like an infitive baffle. The impedance is not altered by the cabinet, and there is one hump only.

Hi from
Bjorn

AggroMagnet · 31st May 2012, 05:35 PM

I suspect you will

I think flush mounting is next on mine - the driver poking out of the flat front isn't very pretty either..
What effect would mounting the driver from behind give?
Like this i mean:

Pictures stolen from interwebs (http://nama.ne.jp/audio/W2-803SM.html)

AggroMagnet · 19th October 2012, 07:43 PM

I now have 4 more of these drivers in need of a "home".
2 will be used for Tabaq, while I want to try Voigt pipes for the other two.

Im thinking about 200cm tall, 4cm wide and 16cm deep (at the bottom). All internal measures.
Will going this narrow give me any potential issues with low frequency reproduction?

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26th May 2012, 06:45 PM	#13
AggroMagnet diyAudio Member Join Date: Apr 2012	Almost done And some live action (low quality..): VIDEO

26th May 2012, 07:12 PM	#14
krakatoa diyAudio Member Join Date: Feb 2007 Location: Cluj-Napoca	There was allot of "action" going on bellow 100hz, the lowest sound I measured for sure from the video was a strong 65hz (guitar) "woom". Impressive!

26th May 2012, 07:30 PM	#15
AggroMagnet diyAudio Member Join Date: Apr 2012	It would be a shame to use a high pass filter on them, wouldn't it? I hope to get some better recording equipment soon..

29th May 2012, 08:44 PM	#16
Bjohannesen diyAudio Member Join Date: Jan 2005 Location: Copenhagen	Nice indeed Which shape /geometry did you end up with. The fine end result looks different from your original drawing. I havent startet building my version, despite i have the drives in house, but your video really inspired me to speed up.

29th May 2012, 09:50 PM	#17
AggroMagnet diyAudio Member Join Date: Apr 2012	Good to hear Tried with a different camera today, a bit less noise: Tangband 2 inch fullrange speakers - YouTube Internal dimensions same as earlier, 895x80x89mm. Port size 80x8mm with 35mm length, tuned for 78hz. Box is otherwise empty, not counting the stuffing. Had to make that goofy foot to stabilize them a bit..

31st May 2012, 05:35 PM	#19
AggroMagnet diyAudio Member Join Date: Apr 2012	I suspect you will I think flush mounting is next on mine - the driver poking out of the flat front isn't very pretty either.. What effect would mounting the driver from behind give? Like this i mean: Pictures stolen from interwebs (http://nama.ne.jp/audio/W2-803SM.html)

19th October 2012, 07:43 PM	#20
AggroMagnet diyAudio Member Join Date: Apr 2012	I now have 4 more of these drivers in need of a "home". 2 will be used for Tabaq, while I want to try Voigt pipes for the other two. Im thinking about 200cm tall, 4cm wide and 16cm deep (at the bottom). All internal measures. Will going this narrow give me any potential issues with low frequency reproduction?