F.Stop Labs via Amazon has 24-Pack Sonic Acoustics 2"x 12"x 12" Sound Absorbing Foam Panels (Black | 9-Block Pyramid) on sale for $41.99 - $16.80 off w/ code T5YYQWAH = $25.19. Shipping is free w/ Prime or on orders $35+.
- 12-Pack Fstop Labs 0.4"x 12"x 12" Acoustic Foam Panels (Gray | 9-Block Square) $13.19
- 12-Pack Fstop Labs 0.4"x 12"x 12" Acoustic Foam Panels (Gray | Square) $13.19
- 12-Pack Fstop Labs 0.4"x 12"x 12" Acoustic Foam Panels (Silver Gray | Square) $13.19
- 12-Pack Sonic Acoustics 2"x 12"x 12" Acoustic Foam Panels (Black | Mixed) $17.99