The Martin Grand J-28LSE Baritone Acoustic-Electric Guitar with its "Grand Jumbo Baritone" tone, playability and power is designed for lower tuning but can also be played in standard tunings. As one of the largest Martins ever, it has a scale length of 27.5", 17" wide lower bout, long neck (21 total frets with 15 clear) and deep body. It boasts a back and sides crafted of East Indian rosewood joined with a scallop-braced Sitka top. A mahogany neck features the classic diamond volute and square tapered headstock, with a fingerboard and bridge crafted of African black ebony.D-TAR wave-length multi-source pickup systemPioneer and longtime leader in acoustic guitar building, C.F. Martin has selected the D-TAR Wave-Length Multi-Source combination pickup and microphone system to include in their top-of-the-line acoustic-electric models. These finely crafted instruments truly show off the features and outstanding tonal qualities that D-TAR delivers, as well as the best characteristics that Martin guitars offer.The D-TAR Multi-Source combines the Wave-Length piezoelectric under-saddle pickup with a miniature condenser microphone that is nestBody size: grand J-14 fret Top: solid sitka spruce Rosette: style 28 Back material: solid east indian rosewood Side material: solid east indian rosewood binding white boltaron Neck shape: modified low oval headstock solid/diamond/square taper Scale length: 27.5'' Number of frets: clear 15 Number of frets: total 21 Fingerboard width at nut: 1-3/4'' Fingerboard position inlays: style 28 Bridge material: solid black ebony Bridge style: belly Tuning machines: grover chrome enclosed w/ large button Pickguard: black Case: geib style Interior label: none Electronics: D-TAR wave-length multi-source