AudioCircle
Industry Circles => GR Research => Topic started by: Danny Richie on 13 Aug 2019, 02:59 pm
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This weeks Tech Talk: https://www.youtube.com/watch?v=TJb8o6zzGi8
I talked a little bit about No Rez in this one. I had to include it in a resonance control talk.
If any of you would like to share your experiences with using No Rez then here or at the Youtube video is a good place to share.
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I was just watching the video myself. Man, my Texan sure showed through when I said the word "butter". :lol:
And I called the NX-Treme the NX-Otica. Sometimes I get me own kids names mixed up these days.
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This is right on time lol. I plan on cutting up some no rez today.
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Again , :thumb: :thumb:
Another point I think worth mentioning is bracing. Bracingis important.. taking a large panel and breaking it up via bracing will reduce resonance signifigantly as well. Just be sure when adding bracing to fillet/chamfer all the sharp edges off. I've seen some of the pre-finished cabinets out there and they are typically built using thinner/less dense material and not overly well braced. Adding bracing along with the no-rez will be a huge upgrade.
With regards to the DIY route (say heavy floor tile/ 1" OC foam), I've done it.... a couple times way back when and IMHO, it was a PITA....too much cutting, too much contact cement, too much time. When I built the cabinests for the OB7's, i switched to no-rez and have never looked back. It's worth every penny.... so much easier to work with and will save you a ton of time. When you stick it in place, be sure to wipe the area it is being placed with a tack rag. Once it's in place, try to rub down with some pressure..... the adhesive is pressure sensitive so rubbing it down help it get a good bite/grip.. If it's going over a smooth painted surface, it sticks basically immediately where it's placed so take your time... it can be very hard to re-position.
We use it in all our builds now
jay
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Danny
I think your basic explanations are invaluable.
Keep it up.
Gary
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For DIY...
What is your thought on double wall cabinets with flexible glue between the layers?
Use 3/4" material (either MDF or good plywood) for the exterior. Then for the large panels use 1/4"-1/2" of a different material on the interior with carpet glue or green glue to adhere the pieces together.
The thought is to add additional mass as well as a material that resonates at different frequency. The flexibility of the glue reducing the transfer of energy between the panels. The rigidity of the inner panel would reduce the mass loading of any drivers.
Of course poly-fill to taste.
This is something I have mentally toyed with for any future box like cabinets.
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For DIY...
What is your thought on double wall cabinets with flexible glue between the layers?
Use 3/4" material (either MDF or good plywood) for the exterior. Then for the large panels use 1/4"-1/2" of a different material on the interior with carpet glue or green glue to adhere the pieces together.
The thought is to add additional mass as well as a material that resonates at different frequency. The flexibility of the glue reducing the transfer of energy between the panels. The rigidity of the inner panel would reduce the mass loading of any drivers.
Of course poly-fill to taste.
This is something I have mentally toyed with for any future box like cabinets.
Glue might get squished down to nothing when bonding the two panels together.
My favorite and easy DIY solid cabinet design can be seen here: https://www.audiocircle.com/index.php?topic=53675
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With regards to the DIY route (say heavy floor tile/ 1" OC foam), I've done it.... a couple times way back when and IMHO, it was a PITA....too much cutting, too much contact cement, too much time.
+1
I went this same route with fitting in floor tile to the inside of the cabinet. It was a royal PITA.
Don't get me wrong, the speakers sound great. But I decided it was not worth the effort.
I'm using No Rez in all new builds.
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+1
I went this same route with fitting in floor tile to the inside of the cabinet. It was a royal PITA.
Don't get me wrong, the speakers sound great. But I decided it was not worth the effort.
I'm using No Rez in all new builds.
Thanks Cody.
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Danny,
I know you recommend no rez for resonance control, but looking at various speaker designs I have seen many things installed in other speakers such as denim or dacron on the walls and polyfill stuffing. Are they also used for resonance control in boxes or are they added for a different purpose?
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Danny,
I know you recommend no rez for resonance control, but looking at various speaker designs I have seen many things installed in other speakers such as denim or dacron on the walls and polyfill stuffing. Are they also used for resonance control in boxes or are they added for a different purpose?
That type of material is just used for absorbing internal acoustic energy or slowing down the air flow in the box.