Eastman AC630-SB Sunburst

A Large Acoustic Designed for Projection and Elegance

With its 17" / 431.8 mm body dimensions, the AC630-SB Sunburst fits within the spirit of large acoustics designed to fill the sound space while maintaining aesthetic appeal. The Truetone Gloss finish, figured maple binding, and decorative elements (abalone rosette, pearloid logo, inlays) give it a decidedly "stage instrument" look without compromising overall balance.

Who Is It For, and What Styles?

Thanks to its long 25.4" / 645 mm scale length and wide 44.5 mm / 1.75" nut width, this guitar is particularly suited for intermediate to advanced guitarists seeking a clear attack, good definition in standard tuning, and excellent support for fingerstyle playing. Its size and dynamics also make it very comfortable for folk accompaniment, pop, bluegrass, or pick playing with broad chords. Without onboard electronics, it is ideal for purists of acoustic sound or for microphone capture in the studio.

Sound Characteristics

The solid Engelmann spruce top promotes a quick response, great sensitivity to nuances, and a silky high register, while the solid flamed maple back and sides provide clarity, a crisp attack, and tighter basses compared to darker tonewoods. The hand-scalloped X bracing helps open up the top, enhancing projection and chord breathing. The ebony fingerboard and bridge, combined with the bone nut and bone saddle, enhance precision, intonation stability, and definition, with well-controlled sustain.

Recommended Compatible Accessories

This guitar comes factory-strung with D'Addario XT Phosphor Bronze .012 - .053 strings: to maintain the same feel and tension, prioritize Phosphor Bronze 12-53 sets when replacing strings.

Technical specifications

Body dimensions	17" x 4 23/32" / 431.8 mm x 119.9 mm	Nut	bone, 1 3/4" / 44.5 mm
Top	solid Engelmann spruce	Side dot color	black
Back and sides	solid flamed maple	Logo	pearloid headstock logo
Bracing	hand-scalloped X bracing	Inlays	pearl and abalone
Rosette	abalone	Neck finish	Truetone Gloss
Binding	top, back, fingerboard, and headstock	Tuners	Gotoh SG301-20GG
Binding material	figured maple	Hardware color	gold
Pickguard	none	Bridge / saddle	ebony / bone
Body finish	Truetone Gloss	String spacing at bridge	2 5/32" / 54.8 mm
Neck material	maple	Bridge pins	ebony
Neck profile	traditional Even "C"	Electronics	none
Fingerboard	ebony	Strings	D'Addario XT Phosphor Bronze .012 - .053
Radius	12" / 305 mm	Action height (12th fret)	bass side 3/32" / 2.38 mm, treble side 2/32" / 1.59 mm
Scale length	25.4" / 645 mm	Case	Hardshell Case
Frets	20 Jescar-FW43080	Truss rod wrench	4 mm
Truss rod	dual-action