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Owens Corning 705 Rigid Fiberglass Boards (RFB) is called for in some bass trap and sound absorber designs.

Specs and Features:

Dimension of 24" x 48" x 2" inches
A popular alternative to 703 Rigid Fiberglass Board when a stronger and somewhat more durable surface is desired.
View Owens Corning Product Information (PDF)

If you need 4 or more pieces, order Owens Corning 705 2 inch Case of 4 here.

For a formaldehyde free alternative, consider Knauf Acoustical Insulation 2" 6lb Boards.

To see more detailed information, check out Selecting the Right Acoustic Material for a comparison of all of our insulation materials.

I received my 4 24x24’’ art acoustic panels today. The quality and performance are impeccable. I would’ve paid twice the price for the same product. Thanks so much for doing what you do so well.