Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators - Page 5 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #41 of 181 Old 11-29-09, 06:54 AM
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

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with room gain should make this a very acceptable build.
Now there's the understatement of the year!




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post #42 of 181 Old 11-29-09, 07:15 AM Thread Starter
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

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Drizt wrote: View Post
WOW, you have done extremely well.

Those subs are going to have more head room than anyone would ever realistically use. And thats a great thing
I'm only building one, "but the song still remains the same"!
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post #43 of 181 Old 11-30-09, 09:21 AM
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

Looks good! Looking forward to seeing this all come together!
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post #44 of 181 Old 11-30-09, 10:07 AM Thread Starter
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

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Kevin Haskins wrote: View Post
It looks small in that picture.

Kevin Haskins
Exodus Audio
Kevin,

It looks much bigger now. That's a 22" monitor up against it and the desk is 3' deep. I can't wait to hear this XBL2 21"er....
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post #45 of 181 Old 11-30-09, 10:11 AM Thread Starter
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

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Lonely Raven wrote: View Post
Looks good! Looking forward to seeing this all come together!
Raven,

I read you were finishing yours up a few days ago. What did you build and do you got a pic?
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post #46 of 181 Old 11-30-09, 11:53 AM
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

that thing is huge. Can't wait to hear your listening impressions once you get it finished.
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post #47 of 181 Old 11-30-09, 02:23 PM
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

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Mike Cason wrote: View Post
Raven,

I read you were finishing yours up a few days ago. What did you build and do you got a pic?

My Maelstrom-X 21" Build Thread

I don't have "final" pictures of it yet. Once it's in place in the livingroom/theater, you really can't see anything interesting. I'll have to pull it out into the middle of the room, take a few photos, and push it back into place.

I'll probably be "finishing" it in truck bed liner, once I figure out what the most economical option is. I'd love to have a local shop spray it, but I can't find any that will take me seriously, or give me a good quote on it. They are too narrow minded to be open to spraying something that *isn't* a truck bed.

Plus measurements...I'm not even sure where my mixing board and Behringer mic is.

Your build makes me want to build a second one of these....or maybe an 18" LLT to compare side by side...but my budget wouldn't allow it. On the plus side, my fiance doesn't care what I put in the livingroom/theater, because she knows I have my own skewed, but decent sense of aesthetics.
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post #48 of 181 Old 11-30-09, 03:41 PM Thread Starter
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

Thanks for the link. You did a nice job. Did you get down to 15 hZ?

Yea you're right....I noticed a lot of "this is what you should have done" comments. PMs work well instead of that kind of posting.

Be happy and enjoy the fruits of your labor. You've got real bass now!

Mike


Quote:
Lonely Raven wrote: View Post
My Maelstrom-X 21" Build Thread

I don't have "final" pictures of it yet. Once it's in place in the livingroom/theater, you really can't see anything interesting. I'll have to pull it out into the middle of the room, take a few photos, and push it back into place.

I'll probably be "finishing" it in truck bed liner, once I figure out what the most economical option is. I'd love to have a local shop spray it, but I can't find any that will take me seriously, or give me a good quote on it. They are too narrow minded to be open to spraying something that *isn't* a truck bed.

Plus measurements...I'm not even sure where my mixing board and Behringer mic is.

Your build makes me want to build a second one of these....or maybe an 18" LLT to compare side by side...but my budget wouldn't allow it. On the plus side, my fiance doesn't care what I put in the livingroom/theater, because she knows I have my own skewed, but decent sense of aesthetics.
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post #49 of 181 Old 11-30-09, 05:56 PM Thread Starter
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

Hanging or gluing polyfill to the top and upper sides of a tall subwoofer cabinet would not ensure that it wouldn't be down in one of your drivers shortly after cranking it up. With my design, there's not much room to attach any raw poly to much surface area.

I decided to take my audio grill cloth and make a very tight and porous "basket" and fill it with the polyfil and seal it up so none could fall out.

I also installed some Sonic Barrier I had in stock and put in on the top and bottom of the cabinet to absorb any potential resonance and standing waves. I may just add some more loose polyfil when I'm done in the bottom just before I install the bottom two passive radiators, or I may leave it as it is and run my Linkwitz frequency CD on it and see where I'm at on my tuning frequency. I may have enough fill already with the "basket fill", plus the Sonic Barrier. It's easy to remove a passive radiator and add some if I think I will need more.
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post #50 of 181 Old 12-01-09, 12:39 AM
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Re: Maelstrom 21" With 4 - 2100 Gram 18" Passive Radiators

Crafty way of installing that poly fill! I just threw pillows and a line of acoustic blanket in mine! LOL

As for getting down to 15Hz...well, I'm not sure if my measurements are correct, but I just updated my post. I've got some repositioning to do, but it looks pretty solid down to 5Hz.
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