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My SMT212 CP755TI / SN12B

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wafflesomd View Drop Down
Young Croc
Young Croc


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Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 10:52pm
I don't think they make the wpu 1209 anymore.

This is kinda why I would rather build the x12.  Four really.  I can make four, good sounding x12's for the price of one good sounding SMT212.  


Edited by wafflesomd - 06 November 2008 at 11:31pm
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Paulo Duto View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Paulo Duto Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 10:34pm

OK Deadbeat

Follow beside my comments refer to compression of 4,3dBs at 0 dB and qt 0,61.
 
Experience with that driver in Selenium horns similar to MT102 always indicate failure due to the absence in play low mids, when people try to eq it;
Play some sims with it BR and you will have a preview.
 
Regards,
 


Edited by Paulo Duto - 06 November 2008 at 10:36pm
Paulo Duto
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Deadbeat View Drop Down
Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 10:23pm
I presented wafflesomd with the two lowest priced drivers. You can't have a free lunch obviously as presented.
Away on extended leave.
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Paulo Duto View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Paulo Duto Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 10:18pm
Hi
May I disagree?
 
Let's compare the curves of the woofers you refered:
 
Firstly the 12PW5 you can see the first peak around 350Hz and than the valley between 400 and 600Hz (-6dBs);
This driver is an upgrade from the 12PW3 (changed the aluminium dome for a paper one)
Now look at the 12PW3 plot,; this is an upgrade from the 12PW2, which present an analog cancellation mentioned of the 12PW5; they corrected (minimized) this but introduced the two big peaks when the dome sings (+6dBs between 1 and 2KHz and than a new valley at 2Khz returning to 0dB position, and than a Everest of +10dBs between 2 and 5 KHz).
 
This 12 PW3 was or is used for guitar boxes (how reproduce 600Hz?);
For guitar box may I suggest the 15PW3; made some boxes with succes;
 
Returning to SMT212 how about experiment the WPU 1209?
 
12PW5 qt 0,31
 
 
12PW3 qt 0,61
 
 
WPU1209 qt 0,32
 
Regards,
 
                 
Paulo Duto
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wafflesomd View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 10:17pm
I don't think I'll be able to stick within the budget on the HF drivers and horns.  Oh well.
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Deadbeat View Drop Down
Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 10:07pm
You'll be wanting a horn to support that frequency as well. Take a look at 18sound's and Faital Pro's offerings on usspeaker.com

Use the search function if you want to know opinions on comps.
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wafflesomd View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 9:48pm
The PW3 would work very well for my budget.  It looks like it's good up to 2k as well.  Polar's look good.

Now for the compression tweeter.  I assume I'll need something that will go down to 1.2.
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Paulo Duto View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Paulo Duto Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 9:43pm
Hi
 
Made a pair of SMTs using a 12" Eros, Qt 0,35, Vas 65, Fs 50, Re 5,9, BL 16,90 Pe 350W, x-max 3,MM, Spl 95,2, and a 2" driver in the hf horn as in picture:
Crossed them passively around 1,6kHz and around 100Hz active:
Used the pair with four modified 1850.
 
Tried them out and put them in a corner; response was effortless good up to 16KHz. Low cut at 40Hz.
 
All I can say all me and audience were very well impressed with that little PA.
 
 
 
A closer view of the grills before attaching the foam:
 
Passive Crossover:
 
I recommend select a good woofer that work well BR up past 2Khz...
 
Regards,
 
 
 
 
 
 
Paulo Duto
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Deadbeat View Drop Down
Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 9:42pm
I've used the PW3 in a reflex and it had quite the HF response.
You might want to check on winisd of course.
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wafflesomd View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 9:39pm
I'll assume those drivers will perform well in the cabinet?
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Deadbeat View Drop Down
Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 9:33pm
4x Selenium 12PW3-SLF from partsexpress is $188.80
4x Selenium 12PW5-SLF from partsexpress is $297.60

I like the DR output from light cone drivers. Think JBL E120.


Edited by Deadbeat - 06 November 2008 at 9:38pm
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wafflesomd View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2008 at 9:26pm
For the pair.
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