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Old 26th March 2007, 09:53 PM   #1
Renron is offline Renron  United States
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Default Titanic MK3 downfiring sub

Here are some pics of my recent build. (while I'm waiting for my drivers for my curved Thor build)
This sub goes DEEP! We watched WOTW with the amp at 1/4 volume setting, it was a threatening feeling when the machine came out from under the street.

sorry about the multiple posts, I don't know how to paste into this thread.
Ron
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File Type: jpg titanic winisd.jpg (81.1 KB, 399 views)
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Old 26th March 2007, 09:55 PM   #2
Renron is offline Renron  United States
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The big box,
What a great wife I have, she said "if it will sound good, go ahead and build it. I don't care if its big"

Happy Man,
Ron
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Old 26th March 2007, 09:57 PM   #3
Renron is offline Renron  United States
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Another view

Those ports are ~17 1/2" long, it's a tall box.

Ron
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File Type: jpg sub 008 (small).jpg (30.0 KB, 416 views)
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Old 26th March 2007, 09:58 PM   #4
Renron is offline Renron  United States
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The "bidness end" Down side up. The legs were not attached yet. I did not have the correct size screws. Legs are 1/2" pipe with rubber caps. 3 work great! I am very happy with this Sub. There are others that are better, (Rythemic servo for one) but for a total of $225 total in parts I can't complain. Gotta love Ebay. All parts were new too!

Ron
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File Type: jpg sub 009 (small).jpg (47.1 KB, 398 views)
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Old 27th March 2007, 02:10 AM   #5
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Looks good... Why did you use a downfiring design?
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Old 27th March 2007, 10:55 AM   #6
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Default Titanic MK3 downfiring sub

Hi RENRON,

What is the software U use for design ur sub and analyse
the O/P and perhaps measure it's SPL O/P ?

Andrew
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Old 27th March 2007, 03:51 PM   #7
Renron is offline Renron  United States
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Thanks for the interest!

I built it as a down-firing sub because:

I am lacking on space in my Family room due to a huge "L " shaped leather couch.
I have an unused corner behind the couch that now serves the only purpose of collecting gigantic dust bunnies.
The WAF is high, because she can use it as a picture / vase / plant stand.
I have never built one before.

I used 2 software modeling programs, both are free. They produced somewhat dissimalar results on vent length. One program displays the minimum port diameter and the other lets you input the diameter you desire, hence the differing lenghts.
WinISD Pro WinISD Pro
Unibox --> Requires MS Excel 97 or 2000 or Winxp Excel Unibox

The exterior dementions of my sub are 16x16x34, built with 3/4" MDF. All interior corners are reinforced with 3/4 x 3/4 MDF ripped to length. I should have made it a tad bit taller to account for driver mass but it had to "hide" somewhat in the corner for WAF.
Checking with WINISD the difference in performance was minimal. (dropped the 22 Hz by ~1/2 Db)
Cabinet still needs to have it's corners rounded and then painted semi-gloss black. I wait on the UPS guy for delivery of Target Ultima black paint.

Happy to help other if you want to build this great sub!

Ron
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