XF412 Internal Damping material

[CapnValamir]

Hi everybody, it's awesome that there's so much help available here. Apologies in advance if this has already been discussed somewhere.

I'm working on a XF412 build. The instructions instruct to line the interior with 1-1.5" thick acoustic/open-cell foam, or 1/2" felt carpet padding.
Parts-express also has a recycled denim material:
https://www.parts-express.com/Sonic-Bar ... quantity=1

Are these options all equivalent? Is there any reason aside from cost/availability to choose one over the other? Should I be planning to get several and A/B compare them?

A potentially relevant factor: I'm using Scumback drivers, which are 5.125 deep. So, I've increased the overall cabinet depth by 2" to accommodate the additional depth and potential differences in magnet diameter. For a deeper cabinet, is less or more damping material desirable?

Also, I'm building the closed-back version.

Thanks!

[Bill Fitzmaurice]

They're equivalent in how they work, but not in price. Carpet padding can be free from local carpet installers as scraps. The additional cab depth won't have any effect.

[CapnValamir]

Thanks Bill!