need Manifold 2 x 18 cabinet plans

djmarvellous · 2nd November 2007, 01:09 PM

Does anybody have the plans for building a
Manifold 2 x 18 cabinet?

as I want to Build this as my Next Speaker Project
but I cant find the Dimensions anywhere

I've head this cabinet and was quite impressed
so if anyone has the plans
pls share

Here is the pictures of it
http://www.speakerstore.nl/index.php...pg=12&prjID=56
http://www.speakerstore.nl/index.php?l=en&pg=12&prjID=6

Cant Wait....

Thanks in Advance

audiomachines · 2nd November 2007, 11:32 PM

http://zmatek.jinak.cz/diy/pbaudio/m...ction.asp.html

djk · 4th November 2007, 09:52 PM

What drivers do you have available?

Unless you use the original drivers, the plan is worthless.

You don't need a plan to build these. All you need do is put the two baffle boards far enough apart to allow for mounting clearance. Figure out the back volume and the port size required for your drivers. That determines all the other dimensions.

djmarvellous · 6th November 2007, 06:10 AM

Thanks Much Apreciated!!!

I have EV EVX 180, BeymaLX60, and RCF L18 P540

Thanks Much Aprecited!!!

Going to Start On These Cabinets....

audiomachines · 6th November 2007, 06:36 AM

no problemo mate

djk · 6th November 2007, 07:06 AM

The original EV design is a 6th order equalized alignment.

A 2 cu ft 2nd order sealed box with an F3 of 30hz can only be 0.18% efficient (84.55dB).
A 2 cu ft 4th order vented box with an F3 of 30hz can only be 0.36% efficient (87.56dB).
A 2 cu ft 6th order vented box with an F3 of 30hz can only be 0.90% efficient (91.54dB).

As we can see, the 6th order alignment is about 7dB more efficient than a sealed box, and 4dB more than a simple ported box.

0.312 is the optimum Qts for 6th order for box size vs efficiency vs bass extension.

If you can give me the T/S parameters on the drivers you're considering I can give you an idea of what can be done with them.

djmarvellous · 8th November 2007, 08:47 AM

Thanks Will lookm em up and give you

AndrewT · 8th November 2007, 09:03 AM

Hi,
are those vented boxes?
just lot's of wasted volume for the two drivers in the middle, but it does protect them if you are on the road.

audiomachines · 8th November 2007, 10:27 AM

you can have a search on this site, keep us posted dj marvellous http://www.thielesmall.com/database.asp

regards,
audiomachines

djmarvellous · 8th November 2007, 10:40 AM

will look em up when I get home today and post them

Thanks for all the Help Will keep you posted...

2nd November 2007, 01:09 PM	#1
djmarvellous diyAudio Member Join Date: Nov 2007	need Manifold 2 x 18 cabinet plans Does anybody have the plans for building a Manifold 2 x 18 cabinet? as I want to Build this as my Next Speaker Project but I cant find the Dimensions anywhere I've head this cabinet and was quite impressed so if anyone has the plans pls share Here is the pictures of it http://www.speakerstore.nl/index.php...pg=12&prjID=56 http://www.speakerstore.nl/index.php?l=en&pg=12&prjID=6 Cant Wait.... Thanks in Advance

2nd November 2007, 11:32 PM	#2
audiomachines diyAudio Member Join Date: Dec 2005 Location: silang, cavite	manifold http://zmatek.jinak.cz/diy/pbaudio/m...ction.asp.html

4th November 2007, 09:52 PM	#3
djk diyAudio Member Join Date: Feb 2001 Location: USA	What drivers do you have available? Unless you use the original drivers, the plan is worthless. You don't need a plan to build these. All you need do is put the two baffle boards far enough apart to allow for mounting clearance. Figure out the back volume and the port size required for your drivers. That determines all the other dimensions. __________________ Candidates for the Darwin Award should not read this author.

6th November 2007, 07:06 AM	#6
djk diyAudio Member Join Date: Feb 2001 Location: USA	The original EV design is a 6th order equalized alignment. A 2 cu ft 2nd order sealed box with an F3 of 30hz can only be 0.18% efficient (84.55dB). A 2 cu ft 4th order vented box with an F3 of 30hz can only be 0.36% efficient (87.56dB). A 2 cu ft 6th order vented box with an F3 of 30hz can only be 0.90% efficient (91.54dB). As we can see, the 6th order alignment is about 7dB more efficient than a sealed box, and 4dB more than a simple ported box. 0.312 is the optimum Qts for 6th order for box size vs efficiency vs bass extension. If you can give me the T/S parameters on the drivers you're considering I can give you an idea of what can be done with them. __________________ Candidates for the Darwin Award should not read this author.

8th November 2007, 09:03 AM	#8
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, are those vented boxes? just lot's of wasted volume for the two drivers in the middle, but it does protect them if you are on the road. __________________ regards Andrew T.


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6th November 2007, 06:10 AM	#4
djmarvellous diyAudio Member Join Date: Nov 2007	Thanks Much Apreciated!!! I have EV EVX 180, BeymaLX60, and RCF L18 P540 Thanks Much Aprecited!!! Going to Start On These Cabinets....

6th November 2007, 06:36 AM	#5
audiomachines diyAudio Member Join Date: Dec 2005 Location: silang, cavite	no problemo mate

8th November 2007, 08:47 AM	#7
djmarvellous diyAudio Member Join Date: Nov 2007	Thanks Will lookm em up and give you

8th November 2007, 10:27 AM	#9
audiomachines diyAudio Member Join Date: Dec 2005 Location: silang, cavite	you can have a search on this site, keep us posted dj marvellous http://www.thielesmall.com/database.asp regards, audiomachines

8th November 2007, 10:40 AM	#10
djmarvellous diyAudio Member Join Date: Nov 2007	will look em up when I get home today and post them Thanks for all the Help Will keep you posted...

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