Just made a DIY Subwoofer Riser (pics) - AVS Forum
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post #1 of 9 Old 05-25-2014, 05:06 AM - Thread Starter
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23"D x 19"W x 13" H

Materials:
2x8x8 Wood - $5.47
2x2' Particle board - $4.48
Legs - $5.15
Rug - $6.48
Screws - 7.97
Fabric - $6.99
Poly Fiber (5lb) - $11.99 ($19.99 - 40% off)

Total cost: $48.53

*Seeing all the MILF's in Hobby Lobby alone is worth it. :P

The thing is beautiful. Made it a little bigger than my current sub for future upgrade. Also planning to add rubber feet when I get my ebay bucks in July.

Question:

-Should I remove the little rubber feet that came with the sub so it sits flat on the platform?

Obligated sexy pics: (Please excuse the potato camera)

















Gonna bust out my SPL meter + REW and start calibrating everything now. tongue.gif:

Cheers.
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post #2 of 9 Old 05-25-2014, 05:55 AM
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Nice job,looks good.Can you notice a difference in sound and if so what kind of difference?
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post #3 of 9 Old 05-25-2014, 07:48 AM
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That is a very nice riser. I like the inside stuff to help it act like a bass trap. I put my risers on wheel because of the weight of the subs and it was much easier for placement. I think the subs sound better being off the ground.

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post #4 of 9 Old 05-25-2014, 06:22 PM
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I think the subs sound better being off the ground.[/quote]

+1 ... I found this to be true also.

Big Daddy over at Bluray.com advises that the ideal height for the middle of the driver is to be 1/4 of the way from the floor to the ceiling. He is of the opinion that raising the sub off the ground is much more important than isolation.

While I had a ML Dynamo700, I had it about 16 percent off the ground and the SVS SB2000s I auditioned were 19 percent off the ground ... They sounded great elevated off the ground.image.jpg

Best laid plans ... The DIY stands are now plant stands.

Aesthetically, however, I can't bring myself to raise my PC12 Plus more than the 2" off the ground that it is now ...


MartinLogan Motion 40s / 30 / LX16s
Marantz SR5007 / UD5007
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exercise room:
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post #5 of 9 Old 05-25-2014, 08:32 PM
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*Seeing all the MILF's in Hobby Lobby alone is worth it. :P 

 

 

haha thats great! But what is a riser for? To reduce how much the ground shakes, which I like the ground to shake, or something?

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post #6 of 9 Old 05-26-2014, 03:51 AM
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Quote:
Originally Posted by yomama99 View Post
 But what is a riser for? To reduce how much the ground shakes, which I like the ground to shake, or something?

Again, according to Big Daddy, raising the sub up off the floor is a "location" thing ... finding the best location for one's sub in the room - how the sub interacts with the walls, floor, and ceiling.


MartinLogan Motion 40s / 30 / LX16s
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post #7 of 9 Old 05-26-2014, 04:16 AM - Thread Starter
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Thanks guys,

Doing a bunch of REW measurements now.

I will update later in the day with floor vs riser graphs, etc..

I tell you what though, making these graphs makes me very happy for some reason. (no nerd) tongue.gif
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post #8 of 9 Old 05-26-2014, 11:38 AM
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Quote:
Originally Posted by TomC1315 View Post

Again, according to Big Daddy, raising the sub up off the floor is a "location" thing ... finding the best location for one's sub in the room - how the sub interacts with the walls, floor, and ceiling.

Absolutely correct. By removing it off the ground you're changing its interaction with a boundary. Like how you place a sub in the corner to maximize the amount of boundaries, by removing it from the floor, you're closer to simulating interaction of the sub in free space. However, you won't get the boundary bump and max SPL will be reduced. There's no absolutely best location, it just depends.
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post #9 of 9 Old 05-26-2014, 12:26 PM
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That not like free space. The sub is 1/2 spaced.

Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus Five 200 amp, Chase SS 18.2(2), VS 18.1(2), Samsung BDP F 7500, Asus/My Book Live HPC 4 TB

Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500
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