Back to navigation


Handcrafted for Electrifying Performance





This article was


Written By





Our Product Research Team





Get to know them!





Mandolins built by Eastman Guitars feature solid tonewoods and an array of striking handcrafted appointments. The ER-M chambered electric mandolin is uniquely outfitted with a semi-hollowbody mahogany body, a maple top, and a custom humbucking pickup for electrifying performance. The mastermind behind the ER-M is none other than esteemed luthier Otto D'Ambrosio, whose creations are played by Grammy winners such as John Mayer and Bruce Springsteen! Eastman Guitars finalizes the ER-M with a gorgeous Truetone gloss finish, pearl thumbnail inlays, ebony control knobs, and other solid wood appointments for stunning looks and fluid function. With the ER-M chambered electric mandolin from Sweetwater, you can realize an entirely new realm of sounds, onstage or off.





Solid mahogany and maple





Solid tonewoods give the ER-M rich character for amplification, not to mention acoustic fortitude that’s perfect for unplugged practice. The ER-M’s one-piece mahogany body is the crux of tone. Electric guitarists have long favored mahogany due to its lasting sustain and rich voice. The ER-M’s chambered semi-hollowbody is exceptionally resistant to feedback, which allows you to achieve unprecedented amplified levels or even pair the ER-M with effects like reverb, overdrive, or delay. Also onboard is a maple top that sweetens mahogany’s voice with brightness and snap. Lastly, the ER-M features a maple neck with an ebony fingerboard laced with pearl thumbnail inlays for effortless fretting and clear visibility onstage.





Serial N2400183


Serial N2400183


Legendary performance from a custom Lollar pickup





Otto D’Ambrosio’s wisdom makes itself known at every point of the ER-M’s design, but his savvy is most evident with the ER-M’s Lollar humbucking pickup. Lollar is a legendary name in the world of boutique guitar pickups, and that reputation carries over in this case. The ER-M’s humbucker is not a guitar pickup shoehorned into a mandolin; instead, it is custom-made with pole spacing for mandolin strings and pickup windings that are tailored for the mandolin’s voice. Most importantly, this pickup’s humbucking design wards off unpleasant noise without introducing feedback or hum. You also get volume and tone controls for shaping output and brightness to taste, and the control knobs are carved from hardwood ebony for a deluxe look!





Eastman Guitars: thinking inside the box





Many know the Eastman Music Company as a trusted name in the realm of band and orchestra instruments. Fortunately for all mandolin lovers, Eastman Guitars has attained a similar stature with its steadfast dedication to this noble and historic instrument. Similar to how Sweetwater got its start, Eastman founder Qian Ni grew his business from its humble origins in the back of his car to its status as a burgeoning, reputable company. True to Ni’s vision, Eastman Guitars meticulously approaches each instrument, backing them with a lifetime warranty and masterful designs crafted for a superb musical experience.





Eastman Music Company President Qian Ni


Serial N2400183


Eastman Guitars ER-M Chambered Electric Mandolin Features:


Chambered electric mandolin designed by master luthier Otto D'Ambrosio


Mahogany semi-hollowbody expertly balances feedback suppression with immersive warmth and sustain


Thin maple neck and a maple top provide comfortable fretting and a high-quality response to player dynamics


Custom contours include an elegant cutaway for improved fret access


Handcrafted and finalized with a Truetone gloss finish for a top-notch look and feel


Custom-voiced Lollar mandolin humbucker with ebony-topped volume and tone controls


Ebony fingerboard with pearl side markers and eye-catching pearl thumbnail inlays


Resonant bone nut and Jescar fret wire maximize string resonance and clarity for professional tone


Ebony headstock overlay with a pearl logo