Shiva-X 200L (~7 ft^3) build thread - Page 3 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #21 of 103 Old 11-05-09, 02:40 PM
Regnar
 
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Re: Shiva-X 200L (~7 ft^3) build thread

I did a Sketchup Drawing of your build. If you would like to use it or if other want to you can check it out in the 3d warehouse under Shiva Sono Sub. I would post a link but havent made it to 5 post yet

I also tried out heating up the pvc. It likes to bounce back to it original form. I also had to use a propane torch for it to actually bend back on its self. First try was a complete failure, I just burnt it to a crisp. The second try turned out much better but..... it also came out of round. I would stick something down the center of the pvc to keep it round as you are forming the flare. It might be just as simple if not quicker to make it out of wood. Just need the right router bit and account for the space that it will take up.

Looking good so far.
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post #22 of 103 Old 11-05-09, 03:44 PM
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Re: Shiva-X 200L (~7 ft^3) build thread

Hi Regnar,
Check this site it will show how to get almost perfect flares on pvc:-

http://www.subwoofer-builder.com/flares-25mm.htm

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DIY completed:

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post #23 of 103 Old 11-05-09, 03:55 PM
Regnar
 
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Re: Shiva-X 200L (~7 ft^3) build thread

[QUOTE=robbo266317;203668]
Check this site it will show how to get almost perfect flares on pvc:-


Just goes to show my Google-Fu is not up to par. Thanks for the link!
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post #24 of 103 Old 11-05-09, 05:58 PM Thread Starter
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Re: Shiva-X 200L (~7 ft^3) build thread

Quote:
Regnar2 wrote: View Post
I did a Sketchup Drawing of your build. If you would like to use it or if other want to you can check it out in the 3d warehouse under Shiva Sono Sub. I would post a link but havent made it to 5 post yet

I also tried out heating up the pvc. It likes to bounce back to it original form. I also had to use a propane torch for it to actually bend back on its self. First try was a complete failure, I just burnt it to a crisp. The second try turned out much better but..... it also came out of round. I would stick something down the center of the pvc to keep it round as you are forming the flare. It might be just as simple if not quicker to make it out of wood. Just need the right router bit and account for the space that it will take up.

Looking good so far.
Cool! Thanks man. Love the modelling....that's pretty much what its going to look like! Amazing.
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post #25 of 103 Old 11-06-09, 03:57 AM Thread Starter
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Re: Shiva-X 200L (~7 ft^3) build thread

Gluing the flange for the inside end of the port tonight.

Here it is pressing on, displacing all the caulking I put on:



And the other side being sealed with the same caulking.....air leaks will NOT be tolerated!

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post #26 of 103 Old 11-06-09, 04:02 AM Thread Starter
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Re: Shiva-X 200L (~7 ft^3) build thread

The portside endcaps that go IN the sonotube were dry today, so I fit them onto the port. The final endcap that resides outside the sonotube will be fit on to the exposed port and then glued to the other endcaps as soon as I sand and paint it. I figured that would be easier to do separately. Same with the driver endcaps....




And sealing the other side. I like this caulking because it cures clear. So that way you know when its dry.



This caulking also feels quite viscous. After applying, it makes a great seal just by running your finger along it.

Last edited by favelle; 11-06-09 at 08:14 PM.
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post #27 of 103 Old 11-06-09, 04:19 AM
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Re: Shiva-X 200L (~7 ft^3) build thread

Looking at the tube height of the sub, it appears it is tall enough to cause a resonance issue at about 105 hz. This can be dealt with by packing in 4-6 inches of fiberglass insulation on the inside of the top cap. Make sure it's well secured, you don't want it to eventually fall down and cover the sub.




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post #28 of 103 Old 11-06-09, 04:25 AM Thread Starter
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Re: Shiva-X 200L (~7 ft^3) build thread

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Looking at the tube height of the sub, it appears it is tall enough to cause a resonance issue at about 105 hz. This can be dealt with by packing in 4-6 inches of fiberglass insulation on the inside of the top cap. Make sure it's well secured, you don't want it to eventually fall down and cover the sub.
I was thinking actually about screwing it down with giant washers or something.....

Will this even produce 105hz? The guy's receiver is set for an 80hz crossover...
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post #29 of 103 Old 11-06-09, 05:13 AM
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Re: Shiva-X 200L (~7 ft^3) build thread

80 hz isn't a brick wall, there will still be output at 100 hz.




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post #30 of 103 Old 11-06-09, 05:17 AM Thread Starter
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Re: Shiva-X 200L (~7 ft^3) build thread

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80 hz isn't a brick wall, there will still be output at 100 hz.
Good to know.....
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