Auralex GREAT-GRAMMA-II Great GRAMMA v2 Acoustic Isolation Platform, 30" x 19" x 1.75"

The Auralex Great GRAMMA v2 is the largest member of the ISO GRAMMA (Gig and Recording, Amp and Monitor, Modulation Attenuator) Series of acoustic isolation platforms. Use a Great GRAMMA v2 under a guitar amp or a monitor wedge and you can instantly improve your sound on-stage or in the studio with a tighter, more focused low end and improved overall clarity as well.

The Great GRAMMA v2 measures 30" W x 19" D x 1.75" H.