5-ply, 6.5mm cross-over shell: 3-ply maple core with American red oak inner and outer plies. This is a proprietary Ludwig design not traditional to most Oak builds. The maple add's more control and low-end to the Oak to produce a more well-rounded tone as opposed to a straight Oak shell.
Dual 45-degree bearing edge for added focus, attach, and tuning control. A 3-ply maple core is used at this shell's core for the apex of the bearing edge for even head to edge contact. The oak inner/outer plies maximize attack and stick definition for a sound with dark presence and sculpted definition.