Author Topic: Dayton Titanic Mk3 15" build  (Read 19579 times)

Offline Robert_E

Dayton Titanic Mk3 15" build
« on: June 13, 2010, 11:27:50 PM »
This is the build thread for the Daytons I bought from Xumbug.

The tuning for these subs where discussed on HTS here:
http://www.hometheatershack.com/forums/diy-subwoofers-general-discussion/28745-llt-airspeed-vs-port-resonance.html#post262038
(There are SPL, port air speed etc graphs in that thread)

The subs are a pair of large sonosubs. 350L and tuned to 17Hz, with 2 150mm ports each.

Started cutting out some discs last weekend but ran into a problem when we discovered that one of the tubes was slightly oval. (No idea how that happened.) So basically the build process started full swing yesterday.



The main tubes are 2m tall, 13mm thick (slightly overkill but that was what I could get) and have an internal diameter of 506mm. The smaller tubes are the ports and have 150mm internal diameters with 5mm walls. Think pink will be used to dampen the top to bottom resonances.


Here's a shot of me holding the Dayton 15". Also gives some perspective on the size of the tubes:


The oval tube I couldn't get back into shape with my full body weight on it (Wouldn't budge at all). So I clamped it between two beams with some ratchet straps. Worked beautifully.


Here's a shot of Anton's (NoSnipeLimit) router jig, it works well. Btw this is the first time I've done any woodworking besides what we did in school and I love this router. Eats through that MDF like its not even there.


On Saturday I bought 3 clamps thinking they would be enough but you can see clearly by the slight gaps (though filled with glue) where there wasn't any clamp pressure. Here is a shot of the part of the bottom end-cap that fits inside the tube:


So this morning I bought some more clamps. Here the top end-cap is drying:


Here are shots of the top end-cap with the slots for the ports cut 1/2 way through.
   

Then cut out the port holes from the top with a diameter slightly less than the internal port diameter. Then cut a piece of the port tubing and put it on the inside of the port holes as a guide to trim these holes the same diameter as the port tubes using a flush trim router bit.


This is the biggest rounding bit I could find that still fit in Anton's router. About 2mm clearance on the sides. When I bought it they said it's a 1 1/8" rounding bit but the final rounding radius I get with it is about 23.5mm


Here the external ports have been rounded with this bit:
   

A test fit if the top end-cap and the port tubes. They will be trimmed to the correct length later on.


Some shots of the driver being test fit in the bottom end-cap. The spec sheet for this driver on part-express.com showed the mounting holes where just bigger than 6mm. So I bought some 6mm allen caps and when I tried to fit them the holes in the driver where way way smaller and I had to drill them bigger.
    

Here's Anton posing next to a mock up assembly. The legs there are just some more cardboard tubes we cut to the correct length.


Will continue the build next weekend.  ;D 

Offline ghostinthemachine

Re: Dayton Titanic Mk3 15" build
« Reply #1 on: June 14, 2010, 01:06:22 AM »
That is WOW!!! Keep it coming!
Conquer yourself rather than the world - Rene Descartes

Offline alternativeroute

Re: Dayton Titanic Mk3 15" build
« Reply #2 on: June 14, 2010, 06:35:35 AM »
Titanic!!!! Good going  ;D You could use those as faux support columns in the house...


The past, the present and the future walk into a bar. It was tense.  :nutter:

Offline oradba69

Re: Dayton Titanic Mk3 15" build
« Reply #3 on: June 14, 2010, 06:37:07 AM »
Eish but it is soooo BIIIGGGGG :o Then again they can be made to look quite good.
Manufacturer of Audio Video furniture.
http://www.lerange.com

Offline NoSnipeLimit

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Re: Dayton Titanic Mk3 15" build
« Reply #4 on: June 14, 2010, 07:44:59 AM »
Very fun build, and it's progressing well.  Can't wait for these two beasts to be fired up.
I'm roughly 1.82m tall, I look so small next to the sonotube.
 
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Offline Timber_MG

Re: Dayton Titanic Mk3 15" build
« Reply #5 on: June 14, 2010, 09:18:20 AM »
Where did you get hold of Sonotube in SA, please do tell.

Offline xumbug

Re: Dayton Titanic Mk3 15" build
« Reply #6 on: June 14, 2010, 09:24:37 AM »
Hi Robert,

Fab build, keep the pics coming. attention to detail that's the way ;)

Stu
SDA Acoustics loudspeakers, Audio Research Ref 3 Pre amp and Ref 210 power amps, Bel Canto VB3.5 Dac, Pathos Endorphin cd player, squeeze box touch.

Offline Hennie

Re: Dayton Titanic Mk3 15" build
« Reply #7 on: June 14, 2010, 01:23:40 PM »
Yes, please tell us the source of those tubes!

Offline MetalMilitia

Re: Dayton Titanic Mk3 15" build
« Reply #8 on: June 14, 2010, 04:38:38 PM »
Been waiting a while for this thread  ;D

Good going, can't wait to hear it once completed!

Offline Robert_E

Re: Dayton Titanic Mk3 15" build
« Reply #9 on: June 15, 2010, 05:15:18 PM »
Thanks guys,

RE the tubes: A forum member asked me not to reveal the source and I said I wouldn't.  :-\

I have to add that a cousin of mine that works in the construction industry enquired about these tubes at his supply manager and the guy gave him the contact details for the same company the above mentioned forum member gave me. The local construction industry seems to use steel molds for forming pillars mostly.

These things aren't as available here as overseas but luckily I could work with the sizes I got.


Offline GECO

Re: Dayton Titanic Mk3 15" build
« Reply #10 on: June 15, 2010, 10:34:06 PM »
that is one incredible build. well done

RE the tubes: A forum member asked me not to reveal the source and I said I wouldn't.  :-\

that is not very nice.  >:( one needs to share unless this forum member wants to make money out of this. If they are available I will make it my mission to find the source  ;) I want to do something like this to add some weight to my OB speakers.

Offline xumbug

Re: Dayton Titanic Mk3 15" build
« Reply #11 on: June 16, 2010, 02:15:33 PM »
Guilty as charged :( Jokes aside. The tubes are available from Disaki cores and tubes and they can make any size. I don't mind sharing this info with you good fellows ;) I am giving my trade secrets away for a good cause :)

Stu
SDA Acoustics loudspeakers, Audio Research Ref 3 Pre amp and Ref 210 power amps, Bel Canto VB3.5 Dac, Pathos Endorphin cd player, squeeze box touch.

Offline GECO

Re: Dayton Titanic Mk3 15" build
« Reply #12 on: June 16, 2010, 07:00:11 PM »
Sorry Stuart. Didn't know I was crossing sword with you and forcing your hand - actually it didn't take to long before I had the information, my brother is in the building trade
been wanting to do something like this for ages.

Offline xumbug

Re: Dayton Titanic Mk3 15" build
« Reply #13 on: June 16, 2010, 07:26:45 PM »
No prob Rudi,

You guys are all in this for the love of things audio, as am I :) It is nice to see others benefit from our dealings and connections, lets face it, Robert for one is doing a great job ;)

Stu
SDA Acoustics loudspeakers, Audio Research Ref 3 Pre amp and Ref 210 power amps, Bel Canto VB3.5 Dac, Pathos Endorphin cd player, squeeze box touch.

Offline Robert_E

Re: Dayton Titanic Mk3 15" build
« Reply #14 on: June 16, 2010, 07:32:58 PM »
Ja thanks for telling the people that Stuart.

Felt so guilty not being able to share this great find  :)