DIY Subwoofer Risers

[MikeDaWiz]

Originally Posted by crazyBLUE

I was Just having fun Mike & giving you A bad time You did A good job & it looks great too .

LOL I know Brent. And thank you. But really, my next plan is for the Monitor 60s or 70s when i get them. Small risers with the spiked feet. I have the equipment now.

[crazyBLUE]

Originally Posted by MikeDaWiz

LOL I know Brent. And thank you. But really, my next plan is for the Monitor 60s or 70s when i get them. Small risers with the spiked feet. I have the equipment now.

You do know that you can just buy the spikes for the towers Mike . They come attached to metal bars that stick out either side of the tower for stability .

[MikeDaWiz]

Originally Posted by crazyBLUE

You do know that you can just buy the spikes for the towers Mike . They come attached to metal bars that stick out either side of the tower for stability .

Do you have a link for those?

[crazyBLUE]

Originally Posted by MikeDaWiz

Do you have a link for those?

This is just A link with what I am talking about . Scroll down threw it & click on A few picks to make them bigger . There are other places you can get them so this is just an example .

http://www.speakerfeet.net/products.html

[Fors*]

Originally Posted by crazyBLUE

This is just A link with what I am talking about . Scroll down threw it & click on A few picks to make them bigger . There are other places you can get them so this is just an example .

http://www.speakerfeet.net/products.html

Wow, they aren't exactly cheap are they?

[crazyBLUE]

Originally Posted by Fors*

Wow, they aren't exactly cheap are they?

There are other places to get them Fors , & remember they are made to supprt something that can be vary heavy too . I'm thinking that price is for 2 bars & that would be for 1 speaker .

[MikeDaWiz]

Originally Posted by crazyBLUE

This is just A link with what I am talking about . Scroll down threw it & click on A few picks to make them bigger . There are other places you can get them so this is just an example .

http://www.speakerfeet.net/products.html

Those are pretty cool, But expensive.

[crazyBLUE]

Originally Posted by MikeDaWiz

Those are pretty cool, But expensive.

those are Mike , But if you shop around I bet you can find them for less .

[MikeDaWiz]

Originally Posted by crazyBLUE

those are Mike , But if you shop around I bet you can find them for less .

Well I will cross the bridge when i come to it. Which wont be for atleast another 7 months.

[crazyBLUE]

Originally Posted by MikeDaWiz

Well I will cross the bridge when i come to it. Which wont be for atleast another 7 months.

Just remember to shop around if & when the time comes .

[MikeDaWiz]

Originally Posted by crazyBLUE

Just remember to shop around if & when the time comes .

Will Do my friend.

[Animo]

Originally Posted by Big Daddy

Getting the subwoofer off the floor and raising it by 2 feet can be beneficial.

And doing 2 feet with mine would have put me back in the hospital.
It was all I could do with 2 people helping me to get mine 5 inches off the floor.....

[Animo]

Originally Posted by crazyBLUE

There are other places to get them Fors , & remember they are made to supprt something that can be vary heavy too . I'm thinking that price is for 2 bars & that would be for 1 speaker .

Pricing was listed as "per pair"!!

[Aerodude73]

Took a bunch of pics, but still need to wait for the Sub & then I'll take pics of the Final process & post those tomorrow. It came out pretty good; I ended up using 2 rows of 1" Foam pieces beneath the Riser vice One. It just looks better that way IMO.

[iangillies24]

I have decided to build myself a subwoofer riser based on all the great feedback from other forum members both here and others that I read. My question is though:

For the foam, is it ok to use memory foam for absorption? I was able to get my hands on a 3 inch thick 12X12 piece since my sub is 14X14. Or is memory foam too dense and will drown out all the base?

[Fors*]

Originally Posted by iangillies24

I have decided to build myself a subwoofer riser based on all the great feedback from other forum members both here and others that I read. My question is though:

For the foam, is it ok to use memory foam for absorption? I was able to get my hands on a 3 inch thick 12X12 piece since my sub is 14X14. Or is memory foam too dense and will drown out all the base?

Not sure where you plan to use the foam, but I think you might be referring to putting the foam under the base of the subriser? If so, then you should be fine. The foam is to prevent standing waves from forming underneath the sub. It shouldn't negatively effect the subs performance at all.

[Aerodude73]

Originally Posted by iangillies24

I have decided to build myself a subwoofer riser based on all the great feedback from other forum members both here and others that I read. My question is though:

For the foam, is it ok to use memory foam for absorption? I was able to get my hands on a 3 inch thick 12X12 piece since my sub is 14X14. Or is memory foam too dense and will drown out all the bass?

I don't see it being an issue at all as it will be Under the Riser where it should be. The Riser I just built (per my posts above), is about 2+ Inches high & I used 2 pieces of 1" Foam under it. Pictures are forthcoming but I've seen the Massive Riser "CrazyBLUE" built (check his thread for pics, if not back in some pages here maybe), and his Subs are on Risers at Least 1' off the floor, with Foam completely inside them. You'll be fine. Good score on the foam!

[progers13]

Originally Posted by iangillies24

I have decided to build myself a subwoofer riser based on all the great feedback from other forum members both here and others that I read. My question is though:

For the foam, is it ok to use memory foam for absorption? I was able to get my hands on a 3 inch thick 12X12 piece since my sub is 14X14. Or is memory foam too dense and will drown out all the base?

You should be ok to use that. I used something similar in my 2nd riser and it works great.

[sesshin]

Has anyone tried replicating the ACS Subtrap as a DIY version yet? I am designing a subwoofer right now and am interested in incorporating something like that as a riser.

My thought was to use a sand-filled Sonotube between two sheets of 3/4" MDF, with maybe some additional dowels supporting the corners, and then 2-4" of OC703 fiberglass around that as a bass trap, which would be wrapped in fabric.

I made a mockup here, the yellow is the fiberglass


As far as what is in the Sonotube, if I'm not mistaken the Subtrap has holes drilled in filled with polyfill to "tune" it, although I'm not sure what the benefit of that is. I would assume that filling it with sand to deaden vibrations would be more preferable. It seems any resonance at any frequency should be avoided if at all possible.

Any thoughts on this would be appreciated.

[Big Daddy]

Originally Posted by sesshin

Has anyone tried replicating the ACS Subtrap as a DIY version yet? I am designing a subwoofer right now and am interested in incorporating something like that as a riser.

My thought was to use a sand-filled Sonotube between two sheets of 3/4" MDF, with maybe some additional dowels supporting the corners, and then 2-4" of OC703 fiberglass around that as a bass trap, which would be wrapped in fabric.

I made a mockup here, the yellow is the fiberglass


As far as what is in the Sonotube, if I'm not mistaken the Subtrap has holes drilled in filled with polyfill to "tune" it, although I'm not sure what the benefit of that is. I would assume that filling it with sand to deaden vibrations would be more preferable. It seems any resonance at any frequency should be avoided if at all possible.

Any thoughts on this would be appreciated.

Your plan is excellent and the subwoofer and the riser will look awesome. However, it may be a bit of an overkill for the riser. You are going to build a riser that you won't be able to move. As you know, the most important factor in determining the performance of a subwoofer in a small home theater room is placement. To find the optimum placement, you need to be able to move the subwoofer and the riser and experiment. A riser filled with sand requires a crane.

I suggest that you build a dolly and put everything on it before you completely finish the subwoofer and the riser. That is what I did after I built this massive subwoofer with the help of Elemental Desings. Check Post # 614 in DIY subwoofer building thread and Post #836 in this thread.