Finished - Pics of my new push-pull subwoofer with 2 x 12" + Bash amplifier :) - Page 2

bossobass · 14th June 2006, 03:55 AM

Very, very nice job, Renato.

Any chance you could post a graph of frequency response, in-room?

Bosso

Xmax BR · 22nd August 2006, 04:05 AM

Dears,

I finished one new subwoofer to my friend...

Look more pics here: http://www.mrweb.com.br/fvm/meliante/

Tks,

Renato

cytokine · 22nd August 2006, 01:36 PM

This just in: you have mad skills, my friend.

I have been planning to make stereo subs as bases for my MTMs and your project has given me an alternative approach to consider for two 12s.

Impressive, and thanks for sharing.

Ap · 23rd August 2006, 11:54 PM

Can someone explain the idea of a push-push subwoofer to me?
Is the box volume twice that of a single driver & are the drivers wired in same or reverse polarity? Thanks.

imjatse · 24th August 2006, 03:22 PM

Great work on both those subs! It really looks like you put a lot of thought into the internal design based on the shots on your site.

454Casull · 25th August 2006, 02:44 AM

Quote:

Originally posted by Ap
Can someone explain the idea of a push-push subwoofer to me?
Is the box volume twice that of a single driver & are the drivers wired in same or reverse polarity? Thanks.

Push-push generally means the woofers are mounted in the same orientation and are powered in phase. "push-push" has nothing to do with box size, although if you want to keep the same response with more drivers you have to multiply the internal volume by the according factor.

Push-pull means the woofers are mounted facing opposite directions and are powered out of phase.

Ap · 27th August 2006, 11:40 PM

Thanks - its just that this seems to be a rather unusual implementation of push-push, ie one forward firing driver & one "up"firing in the base of the enclosure.

paulspencer · 28th August 2006, 08:05 AM

M&K do the same thing in some of their subs.

Nice work.

My only issue is regarding using push pull with drivers not mounted on the same baffle. I emailed Linkwitz regarding having the drivers apart, and he stated the only way he would do it is with both drivers on the same baffle. It doesn't make sense to me that they should have to be that close, however I'm inclined to think twice since I regard his opinion very highly as one of the great leaders in speaker design.

Ap · 29th August 2006, 10:16 AM

Thanks - thats the info I was looking for, will check out M&Ks site.

speekergeek · 1st September 2006, 06:13 AM

I have been frequenting this forum for years even before i registered.... and i have to say that is one of the best designs (aesthetically) i have seen..
ABSOLUTLY BEAUTIFUL!

22nd August 2006, 04:05 AM	#12
Xmax BR diyAudio Member Join Date: Mar 2004 Location: Rio de Janeiro - Brazil	New Toy :) Dears, I finished one new subwoofer to my friend... Look more pics here: http://www.mrweb.com.br/fvm/meliante/ Tks, Renato

28th August 2006, 08:05 AM	#18
paulspencer diyAudio Member Join Date: Sep 2003 Location: Melbourne, Australia	M&K do the same thing in some of their subs. Nice work. My only issue is regarding using push pull with drivers not mounted on the same baffle. I emailed Linkwitz regarding having the drivers apart, and he stated the only way he would do it is with both drivers on the same baffle. It doesn't make sense to me that they should have to be that close, however I'm inclined to think twice since I regard his opinion very highly as one of the great leaders in speaker design. __________________ AUDIO BLOG \| Bass integration guide My work: www.redspade.com.au web design studio

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14th June 2006, 03:55 AM	#11
bossobass diyAudio Member Join Date: Jan 2005 Location: NC	Very, very nice job, Renato. Any chance you could post a graph of frequency response, in-room? Bosso

22nd August 2006, 01:36 PM	#13
cytokine diyAudio Member Join Date: Aug 2004 Location: North Carolina	This just in: you have mad skills, my friend. I have been planning to make stereo subs as bases for my MTMs and your project has given me an alternative approach to consider for two 12s. Impressive, and thanks for sharing.

23rd August 2006, 11:54 PM	#14
Ap diyAudio Member Join Date: May 2002 Location: Sydney, Australia	Can someone explain the idea of a push-push subwoofer to me? Is the box volume twice that of a single driver & are the drivers wired in same or reverse polarity? Thanks.

24th August 2006, 03:22 PM	#15
imjatse diyAudio Member Join Date: Apr 2006 Location: virginia.usa	Great work on both those subs! It really looks like you put a lot of thought into the internal design based on the shots on your site.

27th August 2006, 11:40 PM	#17
Ap diyAudio Member Join Date: May 2002 Location: Sydney, Australia	Thanks - its just that this seems to be a rather unusual implementation of push-push, ie one forward firing driver & one "up"firing in the base of the enclosure.

29th August 2006, 10:16 AM	#19
Ap diyAudio Member Join Date: May 2002 Location: Sydney, Australia	Thanks - thats the info I was looking for, will check out M&Ks site.

1st September 2006, 06:13 AM	#20
speekergeek diyAudio Member Join Date: Oct 2003 Location: santa rosa	I have been frequenting this forum for years even before i registered.... and i have to say that is one of the best designs (aesthetically) i have seen.. ABSOLUTLY BEAUTIFUL!

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