The AC1M, concert body cutaway guitar, features solid sitka spruce top with scalloped bracing and mahogany back and sides. Yamaha's original SRT piezo pickup ensure solid plugged-in performance. Concert Body Cutaway Solid Sitka Spruce Top Mahogany Back & Sides New Scalloped Bracing for Louder, Richer Acoustic Sound Cut-through Plugged-in Sound by the SRT Piezo Pickup High Comfort Neck Profile Simple and Distinctive Looks Elixir Strings