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Old 6th April 2010, 11:18 PM   #941
amants is offline amants  Philippines
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Quote:
Originally Posted by dj_jojo_md View Post
This the new version of XXX36XX...
take note that the original CV has an aluminum panel for cooling system.
Just another C-horn...DIY friendly easy to build.
For aluminum cover use a 1/4" gauge and ribbed with a 3/4" x 2" hardwood to support it from flexing.(we experience this when we built 4 for my clients install)

have a nice day
jojo
good day sir jojo..any sugestion if what driver is suitable for this new cv box.pwede b dito ung jh186 or the pd1850B of neusch ,any sugestion pls. thanks..regards
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Old 6th April 2010, 11:35 PM   #942
Jef3 is offline Jef3  Philippines
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Quote:
Originally Posted by audiomachines View Post
http://www.paudio.ru/downloads/SD18EL.pdf

Precision Devices International Limited

the specs of the two drivers above

take note of the power handling (Watts), Fs, BL and Xmax figures of the two drivers
Thanks for sharing.

Actually this is an old (SD 18el) spec sheet. I think the power rating has been revised to 1000 watts RMS from the time I first heard the SD 18el almost 3 years ago.

As for the Xmax, I too find it underrated and so was my previous SD18. It's the predecessor of the SD 18el which only registers (Xmax of 5.0 mm only) . But the old SD18 is a hell of a speaker and I consider it as probably the best woofer I had. Nevertheless, I'll try to ask for the latest SD 18el spec sheet if it is available.

As for the other parameters, I think the PD should be a better speaker over-all since it's a Precision Device .

Just my two cents.

Click the image to open in full size.
SD18 old series. For me the best 18" woofer I had.
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Old 7th April 2010, 01:26 AM   #943
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^ yap you get what you paid for almost the same motor structure yet the other has more BL, This means the magnetic circuit where optimized, I could only imagine what the BH curve looks like, more linear, cause they where able to use a voicecoil with an 11 mm Xmax. If only someone could provide me with the the "other engineering data" cutaway view of the motor structure, the alloy or grade of the steel part (toplate, backplate) the grade of the magnet etc. or better yet the FEMM analysis of these beast. So that we will be able to see what is really going on "inside" the speaker and why the other manufacturer is charging that much. just my two cents
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Old 7th April 2010, 06:44 AM   #944
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@amants

AB-36C...looking for 18" stroker mechanical dimension no luck...i lost my copy.
So there is no way i can tell if the JH's and the PD's will fit in.
if ever they do fit in...they will perform very differently from the original.
it may surpass the original in terms of robustness due to JH186 have approx. 6" VC and PD1850 have approx. 5" VC...if memory serves me right CV stroker have a 3" VC which requires an adequate cooling system...correct me if i am wrong.

One thing i am sure of if ever they fit in...with the JH's and PD's you got more sensitivity, SPL and power compression is so so far away.(Block of 4 boxes)

i used to have CV's a long time ago...Junior earthquake L36JE and the Senior earthquake L48SE...i know how they perform. i still have those original plan.

If ever your going to try and pursue to do the driver mods...good luck.

have fun,
jojo
Attached Images
File Type: jpg L48SE.jpg (72.7 KB, 632 views)
File Type: jpg L48SE2.jpg (39.2 KB, 601 views)
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Old 7th April 2010, 07:31 AM   #945
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For p-audio...Thailand site

:: Pantown :: everyone's online society

lots of plans for p-audio's Thai DIYer. i envy these people because they do support their "Local Produce", i hope someday we too will be solid to support our own...

have fun
jojo
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Old 7th April 2010, 12:23 PM   #946
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Default WSX @ 0.5x Pi

i was learning how to use hornresp, and i got several simulations with different drivers. WSX @ 0.5 x Pi

SPL IMF 18" (gray) and 650EL (black)
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File Type: jpg IMF (gray) 650EL (black).jpg (44.2 KB, 577 views)
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Old 7th April 2010, 12:27 PM   #947
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and the giants PD 1850 (800w) and SD18 (1000)
SD18(gray) PD1850(black)
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File Type: jpg SD18(gray) PD1850(black).jpg (44.5 KB, 561 views)
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Old 7th April 2010, 12:30 PM   #948
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SD18(gray) 650EL(black)
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Old 7th April 2010, 12:43 PM   #949
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one of our DIY midtops. inspired by line array concept. the line array guide published in P Audio website although not about butterfly design, is also helpful.

advantage- has wide coverage & directional, disadvantage-it became totally too bulky and sometimes hard to hit the right balance of the sound between the compression driver and the C12". we hope to have one speaker management audio processor soon. (any recommended brand aside from Driverack PA?)

drivers 1 pc BMD 750, and 2x C12" 300W (but then we run out of budget, so we inserted non P Audio drivers. )
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File Type: jpg IMG_6828.JPG (588.1 KB, 281 views)
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Old 7th April 2010, 01:05 PM   #950
amants is offline amants  Philippines
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Join Date: Aug 2009
Location: philippines
Quote:
Originally Posted by dj_jojo_md View Post
@amants

AB-36C...looking for 18" stroker mechanical dimension no luck...i lost my copy.
So there is no way i can tell if the JH's and the PD's will fit in.
if ever they do fit in...they will perform very differently from the original.
it may surpass the original in terms of robustness due to JH186 have approx. 6" VC and PD1850 have approx. 5" VC...if memory serves me right CV stroker have a 3" VC which requires an adequate cooling system...correct me if i am wrong.

One thing i am sure of if ever they fit in...with the JH's and PD's you got more sensitivity, SPL and power compression is so so far away.(Block of 4 boxes)

i used to have CV's a long time ago...Junior earthquake L36JE and the Senior earthquake L48SE...i know how they perform. i still have those original plan.

If ever your going to try and pursue to do the driver mods...good luck.

have fun,
jojo
thank you sir jojo..have a nice day
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