Dual Opposed AV15H Subwoofer Build - Page 28 - AVS Forum | Home Theater Discussions And Reviews
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post #811 of 820 Old 07-11-2016, 06:12 AM - Thread Starter
pbc
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Also, and this may just be a bad idea, but I have the ability to get a couple AE 18" 2500g passive radiators for fairly cheap. I don't think John makes them anymore so I don't believe I can get more.

I know there was an older dual PR + 15" AV15H design that worked well, but am wondering if anything could be done with a single 18" PR and dual AV15H's in a box that would outdo the sealed ones above? I may still go with sealed due to WAF...but thought I'd ask!

Edit: NM ... answered my own question .... bad idea to go with 1 18" PR and 2 15" drivers!

 

My DIY Subs ... http://www.avsforum.com/avs-vb/showthread.php?t=1233892

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J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 


Last edited by pbc; 07-11-2016 at 08:54 AM.
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post #812 of 820 Old 07-11-2016, 07:31 AM - Thread Starter
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Wow 15" drivers (save the Dayton's) and 18" PR's seem to have gone the way of the dodo bird!

 

My DIY Subs ... http://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 


Last edited by pbc; 07-11-2016 at 07:37 AM.
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post #813 of 820 Old 07-11-2016, 08:30 AM
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Saw those (Can't recall where though ... have a link?). But I wasn't sure how they would be affixed to the glass hardware. Are they screwed into the glass, or would they simply sit on the outside edges?
They go through the glass. So first you tight the bottom part into the wood/MDF. Then put the glass on then screw the top part on. The top piece has a soft felt bottom to go against the glass.

They are what Bosso uses.
http://bossobass.com/Bossobass.com/B...cessories.html
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post #814 of 820 Old 07-12-2016, 12:09 PM - Thread Starter
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Thanks Chrap, found them again. Any ideas on similar style 3" stainless steel "feet"?

 

My DIY Subs ... http://www.avsforum.com/avs-vb/showthread.php?t=1233892

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J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #815 of 820 Old 07-12-2016, 08:24 PM
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Thanks Chrap, found them again. Any ideas on similar style 3" stainless steel "feet"?
Most of the companies I have chatted with dont have anything for the bottoms. Some I found have a very thing piece of foam but nothing that would have any real protection. BUT I would just make my own or buy some felt feet at HD or Lowes. I tend to make my own stuff a lot because I have so much scrap around my house.

Also are you talking 3" tall or 3" diameter or what?

The legs/standoffs come in all sizes from small to 6". The widths are about 1/2" to about to 1.5" I think. Chrome, brass or stainless. If I wanted larger I would probably just make my own out of MDF and aluminum tape.

I cant remember whom but I did see someone on AVS, I believe, who machined some feet out of aluminum. Could be a different material but its an idea if you have the fund. This day and age you can have whatever you want made. I tend to try things that I personally can afford. So its usually a DIY effort for everything for me.
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post #816 of 820 Old 07-13-2016, 06:04 AM - Thread Starter
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3" tall, ideally less than 2" in diameter. Was looking for something in a similar brushed stainless cylinder to the glass standoffs that can of course hold what will be ~130lbs or more. Probably just use furniture sliders on the bottom of the feet to help the glide on the hardwood!

 

My DIY Subs ... http://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #817 of 820 Old 07-13-2016, 05:56 PM
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Shouldn't be too hard to find. They are mainly in 1/2" to 1" size diameters and as I said up to 6" tall. I would assume each standoff can have 130lbs placed on top of them. Probably much more than that.
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post #818 of 820 Old 07-14-2016, 05:01 AM
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I built two dual opposed AV15 sonotubes vertically myself, but for what it's worth AE swears up and down you shouldn't use the driver in such a way and that doing so will void the warranty.

My next two dual opposed AV15 subs will be horizontal in a wood box instead of vertical in a sonotube (though not because of this).
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post #819 of 820 Old 07-14-2016, 06:05 AM - Thread Starter
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Yeah John mentioned that when I asked ages ago, but my AV15H's are now 7 or so years old, so well out of warranty.

Why are you moving from vertical to horizontal?

 

My DIY Subs ... http://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #820 of 820 Old 07-14-2016, 06:37 AM
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Why are you moving from vertical to horizontal?
After building two I feel sonotubes are a waste of space. I can build a box with the same effective footprint that isn't as tall with the same volume of air. If I'm building a box there's no compelling reason to put them top and bottom instead of on two opposing sides.
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