woofers in India cont.......

sumit · 11th February 2009, 04:41 AM

Hi guys ...A 3 way speaker system was what i planned a few years back and now its time ...well almost to complition . A few years time was required as i had to arrange for the money,time,effort etc etc......

The mid/tweeter section took me more than a year to finish ( as i had to design the mid woofer + crossover ). Its almost the same case with the bass section (no x-over).

Though a few decent 12" woofers are availble locally, I thought why not make a more decent one. So it started and here r the results. And as always it a pleasure to share it on this site. A few construction images of the woofers and the cabinets.

Woofer data :-
Fs - 29Hz
Qes - .387
Qms - 12.2
X max - 7mm lin
Vas - 4.02
Re - 4ohms
Spl - 90.3dB
Le - 1.1mH ( 4layer/52mm/Kapton VC )
Bl ~ 16 +
piston dia = 10.5"

http://i130.photobucket.com/albums/p.../motorpole.jpg
http://i130.photobucket.com/albums/p...77/poletop.jpg
http://i130.photobucket.com/albums/p...orclose-up.jpg
http://i130.photobucket.com/albums/p...a77/magnet.jpg
http://i130.photobucket.com/albums/p...77/venting.jpg
http://i130.photobucket.com/albums/p...utta77/box.jpg
http://i130.photobucket.com/albums/p...7/boxfront.jpg
http://i130.photobucket.com/albums/p...oxsideview.jpg
http://i130.photobucket.com/albums/p...77/boxside.jpg
http://i130.photobucket.com/albums/p...xfrontview.jpg

more pictures would follow as i achive completion. No x-over though as its for a bi-amp system crossed at 220Hz using 4th order LR filter.

enjoi....
sumit

a_tewinkel · 11th February 2009, 06:30 PM

Wow, you constructed your own woofer driver? Did you use parts from other woofers like the frame and cone?

sumit · 12th February 2009, 02:39 AM

"Wow, you constructed your own woofer driver?" >> have been designing dirvers for the last 8 years

"Did you use parts from other woofers like the frame and cone ":- No , I buy the cones and get the cast frames made on order.

cheers..

sivan_and · 12th February 2009, 05:21 AM

CONGRATS !!! for being extreme Diy..and ur thoughts abt sharing the design with other diyers !! highly appreciated

somakmaitra · 12th February 2009, 05:25 PM

sumit babu ,
Darun baniachen great work.

sumit · 13th February 2009, 03:39 AM

Thanks guys...... more pictures soon...

sumit · 16th February 2009, 03:10 AM

A few more self explaining pictures:-

http://i130.photobucket.com/albums/p...asswool1st.jpg
http://i130.photobucket.com/albums/p...7/GWfitted.jpg
http://i130.photobucket.com/albums/p.../holdspray.jpg
http://i130.photobucket.com/albums/p...a77/paint1.jpg
http://i130.photobucket.com/albums/p...a77/panit2.jpg
http://i130.photobucket.com/albums/p...a77/paint3.jpg
http://i130.photobucket.com/albums/p...a77/final1.jpg
http://i130.photobucket.com/albums/p...77/closeup.jpg

cheers....

sivan_and · 16th February 2009, 06:21 AM

is that U in one of the pics with half of face covered..just curious to know abt the GREAT Diy'er

sumit · 16th February 2009, 06:29 AM

yup...thats me....but I am no great one...

sumit · 24th February 2009, 10:28 AM

http://i130.photobucket.com/albums/p...7/sideview.jpg
http://i130.photobucket.com/albums/p...iewanother.jpg

11th February 2009, 04:41 AM	#1
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	woofers in India cont....... Hi guys ...A 3 way speaker system was what i planned a few years back and now its time ...well almost to complition . A few years time was required as i had to arrange for the money,time,effort etc etc...... The mid/tweeter section took me more than a year to finish ( as i had to design the mid woofer + crossover ). Its almost the same case with the bass section (no x-over). Though a few decent 12" woofers are availble locally, I thought why not make a more decent one. So it started and here r the results. And as always it a pleasure to share it on this site. A few construction images of the woofers and the cabinets. Woofer data :- Fs - 29Hz Qes - .387 Qms - 12.2 X max - 7mm lin Vas - 4.02 Re - 4ohms Spl - 90.3dB Le - 1.1mH ( 4layer/52mm/Kapton VC ) Bl ~ 16 + piston dia = 10.5" http://i130.photobucket.com/albums/p.../motorpole.jpg http://i130.photobucket.com/albums/p...77/poletop.jpg http://i130.photobucket.com/albums/p...orclose-up.jpg http://i130.photobucket.com/albums/p...a77/magnet.jpg http://i130.photobucket.com/albums/p...77/venting.jpg http://i130.photobucket.com/albums/p...utta77/box.jpg http://i130.photobucket.com/albums/p...7/boxfront.jpg http://i130.photobucket.com/albums/p...oxsideview.jpg http://i130.photobucket.com/albums/p...77/boxside.jpg http://i130.photobucket.com/albums/p...xfrontview.jpg more pictures would follow as i achive completion. No x-over though as its for a bi-amp system crossed at 220Hz using 4th order LR filter. enjoi.... sumit

12th February 2009, 02:39 AM	#3
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	woofers in India conti... "Wow, you constructed your own woofer driver?" >> have been designing dirvers for the last 8 years "Did you use parts from other woofers like the frame and cone ":- No , I buy the cones and get the cast frames made on order. cheers..

12th February 2009, 05:21 AM	#4
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	CONGRATS !!! for being extreme Diy..and ur thoughts abt sharing the design with other diyers !! highly appreciated __________________ SivanandBalan

16th February 2009, 06:21 AM	#8
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	is that U in one of the pics with half of face covered..just curious to know abt the GREAT Diy'er __________________ SivanandBalan

24th February 2009, 10:28 AM	#10
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	a few more snaps http://i130.photobucket.com/albums/p...7/sideview.jpg http://i130.photobucket.com/albums/p...iewanother.jpg


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11th February 2009, 06:30 PM	#2
a_tewinkel diyAudio Member Join Date: Feb 2008 Location: Enschede, Overijssel	Wow, you constructed your own woofer driver? Did you use parts from other woofers like the frame and cone?

12th February 2009, 05:25 PM	#5
somakmaitra diyAudio Member Join Date: Mar 2003 Location: calcutta	sumit babu , Darun baniachen great work.

13th February 2009, 03:39 AM	#6
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	Thanks guys...... more pictures soon...

16th February 2009, 03:10 AM	#7
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	A few more self explaining pictures:- http://i130.photobucket.com/albums/p...asswool1st.jpg http://i130.photobucket.com/albums/p...7/GWfitted.jpg http://i130.photobucket.com/albums/p.../holdspray.jpg http://i130.photobucket.com/albums/p...a77/paint1.jpg http://i130.photobucket.com/albums/p...a77/panit2.jpg http://i130.photobucket.com/albums/p...a77/paint3.jpg http://i130.photobucket.com/albums/p...a77/final1.jpg http://i130.photobucket.com/albums/p...77/closeup.jpg cheers....

16th February 2009, 06:29 AM	#9
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	yup...thats me....but I am no great one...

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