The Mercer Grand Auditorium is features a Sapele body with a solid Sitka spruce top to give a bright tone, full of clarity and nuance.
The slim, supremely playable Mahogany neck is topped with a 21-fret Rosewood fingerboard inlaid with bold Pearl Blocks.
Fishman INK-4 electronics let you plug into just about any source, and include and on-board LED tuner for easy preparation. 
The D'Angelico Excel Series Mercer Features :
 
Body
Grand Auditorium, Single-Cutaway • TOP : Solid Sitka Spruce • BACK & SIDES : Solid Sapele
Neck
Mahogany • C-Shape
Fingerboard
Rosewood, with Mother-Of-Pearl Block Inlays & Black Side Dot Position Markers
Frets
21 Medium Jumbo
Binding
5 Ply
Headstock Veneer
Ebony Veneer with Mother-Of-Pearl Shield
Nut
Bone • Width : 44.45mm (1 3/4")
Pickguard
Tortoise Scalini
Rosette
Concentric Rings • Black/White/Abalone
Bridge
Rosewood, with FU-Tone brass bridge pins & Bone Saddle
Scale
25.5"
Neck Radius
30.48cm (12")
Electronics
Fishman INK-4 Piezo Pickup + 3 band Preamp with LED Tuner
Hardware
Gold
Truss Rod
Dual Action with Aluminum Skyscraper Cover
Tuners
Grover Imperial Super Rotomatic
Output Jack
Side Mount Switchcraft
Case
D'Angelico Fitted Hard Case