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?l=en&pg=12&prjID=56
http://www.speakerstore.nl/index.php?l=en&pg=12&prjID=6
Cant Wait....
Thanks in Advance
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?l=en&pg=12&prjID=56
http://www.speakerstore.nl/index.php?l=en&pg=12&prjID=6
Cant Wait....
Thanks in Advance
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.
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.
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.
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.
you can have a search on this site, keep us posted dj marvellous http://www.thielesmall.com/database.asp
regards,
audiomachines
regards,
audiomachines
Just about ready
Been ocupied by other things and my job
but now Im ready to build these babies
Im Going to be using Beyma 18G50 Speakers
here are the parameters:
Brand Beyma
Model 18 G50
Description Die cast aluminium basket. Paper cone. Plasticised cloth surround. Edgewound alum. flat wire voicce coil.
Range / type woofer
Typical use PA
Recomended enclosure Box size 80 / 200 Liters
Series PRO LF
Manufacturer Beyma
Order nr
Production status Active 2003
Nom. diamerer [inch] 18
Vas [Liters] 212
Qts 0,325
Qes 0,334
Qms 12,05
Fs [Hz] 40
Sensitivity [dB] 98
Max Power [W] 800
Power definition W AES
Lower freq [Hz] 25
Upper freq [Hz] 1500
Rec. Filter freq [Hz]
xmax [mm] 9
Moving mass [g] 170
Disp area [m2] 0,132
Disp Vol [cm3] 1,18
xdamage [mm] 40
Air gap [mm] 11
Coil height [mm] 25
Coil diameter [mm] 114
Cms [mm/N] 93
Rms [N*s/m] 3,54
Magnet weight [gr]
Magnet height [mm]
Magnet diameter [mm]
Magnet material - Ferrite
Re [ohm] 6,1
Z [ohm] 8
L [mH] 2
Bl [Tm] 28,8
Magnetic flux [Wb]
Flux density [T]
Outer diam. [mm] 460
Bolt circle [mm] 438
Nr of bolts [Nr]
Cutout [mm] 415
Weight [Kg] 14
Height [mm]
Depth [mm] 210
Driver volume [Liters] 13
Frequency SPL / Z
would these make good drivers for this enclosure?
Could someone please give me the dimensions off all
the boards needed to build this enclosure? (I find the plans confusing)
Thanks In Advance.
Been ocupied by other things and my job
but now Im ready to build these babies
Im Going to be using Beyma 18G50 Speakers
here are the parameters:
Brand Beyma
Model 18 G50
Description Die cast aluminium basket. Paper cone. Plasticised cloth surround. Edgewound alum. flat wire voicce coil.
Range / type woofer
Typical use PA
Recomended enclosure Box size 80 / 200 Liters
Series PRO LF
Manufacturer Beyma
Order nr
Production status Active 2003
Nom. diamerer [inch] 18
Vas [Liters] 212
Qts 0,325
Qes 0,334
Qms 12,05
Fs [Hz] 40
Sensitivity [dB] 98
Max Power [W] 800
Power definition W AES
Lower freq [Hz] 25
Upper freq [Hz] 1500
Rec. Filter freq [Hz]
xmax [mm] 9
Moving mass [g] 170
Disp area [m2] 0,132
Disp Vol [cm3] 1,18
xdamage [mm] 40
Air gap [mm] 11
Coil height [mm] 25
Coil diameter [mm] 114
Cms [mm/N] 93
Rms [N*s/m] 3,54
Magnet weight [gr]
Magnet height [mm]
Magnet diameter [mm]
Magnet material - Ferrite
Re [ohm] 6,1
Z [ohm] 8
L [mH] 2
Bl [Tm] 28,8
Magnetic flux [Wb]
Flux density [T]
Outer diam. [mm] 460
Bolt circle [mm] 438
Nr of bolts [Nr]
Cutout [mm] 415
Weight [Kg] 14
Height [mm]
Depth [mm] 210
Driver volume [Liters] 13
Frequency SPL / Z
would these make good drivers for this enclosure?
Could someone please give me the dimensions off all
the boards needed to build this enclosure? (I find the plans confusing)
Thanks In Advance.
Hi,
FYI, The manifold and the suggested Beyma 18 G50 drivers using the layout of djk:s posted picture (post #11) simulated in a 310 Liter (red color plots) ported box, drivers on the front baffle, picture 1(2) to 2(2).
Using the same box but reducing the internal volume to 250 L (black colour plots) where the volume occupied by the manifold and drivers is arbitrarily set to be a loss of 60 L.
At last: A probable impact on the front side driver output from the slot and baffle load, marked with blue colour and blue plot using a separate simulation from MJK: s BLH_Sections_3_21_07[1] program sheet.
b
1(2)
FYI, The manifold and the suggested Beyma 18 G50 drivers using the layout of djk:s posted picture (post #11) simulated in a 310 Liter (red color plots) ported box, drivers on the front baffle, picture 1(2) to 2(2).
Using the same box but reducing the internal volume to 250 L (black colour plots) where the volume occupied by the manifold and drivers is arbitrarily set to be a loss of 60 L.
At last: A probable impact on the front side driver output from the slot and baffle load, marked with blue colour and blue plot using a separate simulation from MJK: s BLH_Sections_3_21_07[1] program sheet.
b
1(2)
Attachments
Thanks 4 the reply bjono
k twister
so that will be 572mm - ( (18x4) + (240X2) )
wich gives me 572mm - ( 72 + 480)
then 572mm - 552mm
wich equals 20mm
but then no 18' speaker has a depth of20mm
the 18g50 im going to use is 210mm
or are the dimensions in inches?
Thanks in advance...
k twister
so that will be 572mm - ( (18x4) + (240X2) )
wich gives me 572mm - ( 72 + 480)
then 572mm - 552mm
wich equals 20mm
but then no 18' speaker has a depth of20mm
the 18g50 im going to use is 210mm
or are the dimensions in inches?
Thanks in advance...
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