Martin X Series 2015 GPX1AE Grand Performance Acoustic-Electric Guitar Natural BodyBody type: Grand Performance 14 Fret Cutaway: Non-cutaway Top wood: Solid Sitka SpruceBack &amp; sides: Mahogany SapeleBracing pattern: A-Frame "X-1" Body finish: None Orientation: Right handed NeckNeck shape: Performing Artist Profile Nut width: 1.75" (44.45mm) Fingerboard: Richlite Neck wood: Birch Laminate - RustScale length: 25.4" Number of frets: 20 Neck finish: NoneElectronics Pickup/preamp: Yes Brand: Fishman Configuration: Undersaddle piezo Preamp EQ: Not applicable Feedback filter: