Sand Filled 1099 Base - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 25 Old 03-30-2017, 05:23 PM - Thread Starter
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Sand Filled 1099 Base

I am currently building a set of bases to heighten my 1099's to get all the horn heights the same. This requires a 14" increase in my case. I've read about filling the hollow space with sand so I did this, but holy crap one 70lb bag of sand went nowhere. As you can see below, each stand has about 35 lbs of sand in it. Looks like they can easily hold well over 100lbs each! Is this dumb? Can I leave just that much in it? Can I put a filler in there like a 4x4 post or something? Please advise this newbie!
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post #2 of 25 Old 03-30-2017, 05:42 PM
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NO doubt -we're all in favor of speakers that are inclined stay put . .

you know that just sometimes, things just have to get shuffled around

you already cut the stands to size for the horn alignment

for that kind of weight and the effort possibly involved

what about "good looking" wheels, furniture dual weight rated, you know

what about a harbor freight dolly, good , so they say, for 1000#, even the small ones.

you could try some 1" wheels, maybe 6 for each base for a less obtrusive look, as long as the weight rating total comes close .

you may have to reduce the height of your stands

carpet would make things a bit tougher but not impossible

it's a bit of work , but you can dissemble a HF dolly and make it the size you "need".
I did that for the VBSS sub, a single dolly

the big subs got co-joined dollies, they clock in at over 300#.

HTH for a possible workable answer/ direction

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post #3 of 25 Old 03-30-2017, 05:50 PM
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35 pounds is good enough. I wouldn't sweat it! My 1099 towers don't have anything in the bottoms and the still weigh 150 pounds each! They aren't going anywhere and having empty bases creates no ill effects.
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post #4 of 25 Old 03-30-2017, 05:52 PM
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I'm sure it's plenty of weight for stability. I'd cut out a board that'll fit inside the box on top of the sand to keep it from sloshing around.
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post #5 of 25 Old 03-30-2017, 05:54 PM - Thread Starter
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Ok I was worried more about resonance than weight, I know they aren't going anywhere weight wise. Also the sand is super dry but I am a little worried about a tiny amount of moisture being in there. Any worry about a tiny amount of moisture? I can stick my hand in and swirl my hand around and my hands will just be covered in dust, no moisture at all, I am just a little worried about it still though.
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post #6 of 25 Old 03-30-2017, 05:56 PM
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If you're stressed about the moisture, you could throw some large sized desiccant packs in there. I think some guys put the sand in a bag to begin with; even multiple gallon size freezer bags would do.
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post #7 of 25 Old 03-30-2017, 06:10 PM
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I used Cat litter in my old ascend 340se stands to not have to worry about moisture.
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post #8 of 25 Old 03-30-2017, 09:15 PM
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Hi

The other alternative to sand would be garnet used for sandblasting and its dry.

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post #9 of 25 Old 03-31-2017, 04:43 AM
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Kitty litter seems to be the most recommended

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post #10 of 25 Old 03-31-2017, 05:18 AM
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Fill it all the way up man. Then put handles on it, and use em as dumbells .

I'd think your fine. As a "thought" you could also run a PVC pipe through it to route your speaker wire up and through it to make things look cleaner, provided you dont have something in place already lol.

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post #11 of 25 Old 03-31-2017, 05:25 AM
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My sand-filled Bright Star Audio bases have been exposed to air for 6 years now with no problems. I'm certain because I just emptied them the other day and the sand flowed freely. No damage to the frames was observed either.

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post #12 of 25 Old 03-31-2017, 05:30 AM - Thread Starter
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Quote:
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Fill it all the way up man. Then put handles on it, and use em as dumbells .

I'd think your fine. As a "thought" you could also run a PVC pipe through it to route your speaker wire up and through it to make things look cleaner, provided you dont have something in place already lol.
You know I hadn't got to designing that part yet. I think I will skip that hassle and make wires enter in the sealed cavity of the 10" driver and skip trying to go through the sand part. Good to think about that now though before putting it all together.

Thanks for all the recommendations, I think I will stick with the sand I have it seems super dry and will probably work.
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post #13 of 25 Old 03-31-2017, 06:54 AM
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Maybe put some bracing in the box if you are worried about resonances. Then you can fill the rest of the space with pink fluffy or similiar.
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post #14 of 25 Old 03-31-2017, 07:41 AM
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As far as I know, sand can't absorb moisture from the air. The only moisture issue is if it's damp coming out of the bag. If it's dry, your fine.

Also, regarding resonance, I'd rather add a couple braces to the box than to fill it with 200 pounds of sand.
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post #15 of 25 Old 03-31-2017, 07:48 AM - Thread Starter
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Quote:
Originally Posted by rhodesj View Post
As far as I know, sand can't absorb moisture from the air. The only moisture issue is if it's damp coming out of the bag. If it's dry, your fine.

Also, regarding resonance, I'd rather add a couple braces to the box than to fill it with 200 pounds of sand.
Ok so that solves it. I'll keep my current sand for weight and throw a brace across in the middle to deaden any resonance. The sand has already one a pretty good job of that but the brace should finish it off.
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post #16 of 25 Old 03-31-2017, 08:39 AM
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Ok so that solves it. I'll keep my current sand for weight and throw a brace across in the middle to deaden any resonance. The sand has already one a pretty good job of that but the brace should finish it off.
As mentioned if you want to make sure just throw those packets you get when you buy shoes, etc in there as you get them. Maybe put a slot in the back or something for it.

Cant hurt and it wont cost you anything since you'd throw those out anyway.

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post #17 of 25 Old 04-19-2017, 01:00 PM
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Did you consider lead weights?
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post #18 of 25 Old 04-19-2017, 01:34 PM
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Just another thought but what about spraying some low expanding foam in there.
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post #19 of 25 Old 04-19-2017, 02:03 PM - Thread Starter
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Quote:
Originally Posted by The_Helmsman View Post
Did you consider lead weights?

Did not. The goal was to kill any resonance not make it weigh 400 lbs

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Originally Posted by Manic1! View Post
Just another thought but what about spraying some low expanding foam in there.
That I hadn't though of at the time but that probably would have been a great idea.
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post #20 of 25 Old 04-19-2017, 02:06 PM
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post #21 of 25 Old 04-19-2017, 05:22 PM - Thread Starter
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Ryan do you have any pictures of the cabinets.
I was hoping I could actually finish a project and then post the final pictures but this project is taking forever. I have assembly almost done then it's time for paint prep. Here is a sneak peek!



The center channel has the grill support assembled.

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post #22 of 25 Old 04-19-2017, 05:38 PM
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Looks good!!!

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post #23 of 25 Old 04-19-2017, 05:59 PM
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Quote:
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I was hoping I could actually finish a project and then post the final pictures but this project is taking forever. I have assembly almost done then it's time for paint prep. Here is a sneak peek!



The center channel has the grill support assembled.

What are you planning on using for grills? How'd you build in the grill support?
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post #24 of 25 Old 04-19-2017, 06:22 PM - Thread Starter
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So the speakers are going to be all white with white fabric grills. I purchased the white grill material from parts express. I bought 3/16" x 3/4" stock metal and had a buddy come over and weld the support together. He made it perfect it fits cozily in there and once I attach the fabric I think it will be nice and snug. I layered 1/2" Baltic birch plywood over the edges of the cabinet for my nice exterior and to hold the grills.
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post #25 of 25 Old Today, 05:20 AM
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Just build a small filler box that leaves a half inch space between it an the current box. put some half, or even one quarter inch, spacers on the bottom to form a space under the inner box. Then fill the gap with sand. that will keep any wall resonances controlled. Fill the inner box with fiberglass.
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