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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.

These panels really help everything come into focus. Notes can finally really be heard, there is finally some separation in the mix and for critical listening that’s a must.