The Majestic Prophonic Bass Drum features a hybrid material shell with 2 interior Walnut layers, 4 exterior Maple layers and reinforcing rings. The tube lugs and Internally chambered aluminum alloy hoops contribute to the the big focused booming sound. The full resonance of of the drum is achieved with all around rubber suspension system in double rings for the best sustain. Included is the lockable 360 degree frame allows tilting at any angle.