Brand new Sonic Replica R—Mahogany back and sides paired with Italian Spruce on top. The Sonic Replica Project is Galloup Studios’ deep dive into what makes vintage flattops so magical. Each Replica begins with a meticulously selected original—like this ’39 D-18—which is then reverse profiled using CT scanning to capture wood density, resonance patterns, and more. Every element, from top and back thickness to finish layers and deflection measurements, is accounted for. The goal? Not just to look the part, but to sound and feel like the real thing.
To date, Galloup Studios has profiled a 1937 D-18, a 1939 D-18, and a 1930 OM, with each Replica tagged with the original serial number followed by ‘SR’ to denote Sonic Replica. These aren’t just guitars—they’re rolling R&D, built to test and prove acoustic theories through fully functional instruments. A celebration of vintage tone with cutting-edge technique behind every note.
Other keywords/misspellings: Luthier, lutherie, bespoke, harptone, 2024
This guitar isn’t just inspired by a vintage ’39 D-18—it is that guitar in spirit, built from the inside out using science and skill in equal measure. The Mahogany and Italian Spruce combination here is lively, punchy, and wide open. It’s uncanny how much it feels like an old friend right out of the case. This is the kind of guitar that makes you rethink what modern lutherie can do. 
Very immediate and responsive, like a classic D-18 ought to be. The mids stand up in the mix with a little extra oomph. Slightly slender neck makes for a silky play feel. 1 in stock
| Scale Length | 25.4 in |
|---|---|
| Nut Width | 1.688 in |
| String Spacing | 2.188 in |
| Woods | Spruce - Italian, Mahogany |
Brand new Sonic Replica R—Mahogany back and sides paired with Italian Spruce on top. The Sonic Replica Project is Galloup Studios' deep dive into what makes vintage flattops so magical
This guitar isn’t just inspired by a vintage ’39 D-18—it is that guitar in spirit, built from the inside out using science and skill in equal measure. The Mahogany and Italian Spruce combination here is lively, punchy, and wide open
Very immediate and responsive, like a classic D-18 ought to be. The mids stand up in the mix with a little extra oomph 