Help me pick some sound deadening mat?

[cvanc]

I want to line my home speaker cabinets with autosound deadening mat, like Dynamat. Feel free to critique my shopping here, I'm no expert!

So far it seems Butyl is the right material, 80 is the right thickness, and Kilmat seems the cheapest vendor. Do I have that right?

I'm not sure about the foil layer for my use, do you think it matters one way or another? Many thanks...

 

[Perry Babin]

Mats like that are meant to add mass to reduce resonances of lightweight materials like sheet-metal. Are your cabinets made of wood? If so, it isn't likely to do much. Damping material (fibrous/fill type) is likely a better choice (or cross-bracing if the panels resonate).

 

[Indigent Audio]

Often you can find tar roofing mat,backed or not at Home Depot or Lowe’s, far cheaper than dynomat and performs similar

 

[Ixnay]

It would help to first know what range of frequencies are being dealt with. This would depend on cabinet thickness, cabinet material and more. Something that could be added or taken away may be a better approach to find a better combination.
Also, the cabinet design matters. Bass reflex/ported are very different than a sealed enclosure or other designs. In car applications, i get it i.e., reduce all vibration as much as possible since you are turning the music up in a tin can.

 

[GM]

Yeah, need the know the needs of the app to comment, but in general it's normally easier to raise an LF cab's resonance above its passband to ~an octave above it by increased rigidity (high MOE panels, bracing) and vice versa for a mids, HF cab (lossy panels, heavy damping).

 

[BilliamDIY]

I bought some from McMaster Carr for this application but haven't used it yet. I also planned to put some into the roof on my station wagon and the front wheel wells and foot space. https://www.mcmaster.com/products/sound-damping-sheets/material~butyl/?s=butyl-rubber-sheets