12/12/2025
-An article on Opening up-S.G.
I’ve always been skeptical of the way people talk about guitars “opening up.” Not because guitars don’t change over time — they clearly do — but because most explanations collapse the moment you ask a basic physics question. They rely on mystique where mechanics should suffice. I’ve spent a lifetime around guitars. I’ve built hundreds myself and helped lead the construction of thousands more. I’ve played and listened to many of the instruments now treated as untouchable vintage benchmarks. When you’ve lived inside that many guitars, patterns emerge whether you want them to or not.
The biggest one is this: once you’re working within a proven bracing system, materials matter more than anything else. That statement tends to make people uncomfortable because it implies limits. It suggests that no amount of playing time, vibration, or ritual can turn mediocre material into something extraordinary. In my experience, that’s exactly right.
Bracing theory is essential. You need a structural system that places the main modes intelligently, couples the top to the air efficiently, and avoids obvious over- or under-stiffness. If the geometry is wrong, the guitar will never be right. But once geometry is competent, and most builders working within established traditions get this right,the ceiling is set by the material itself. Two guitars can share the same outline, thicknesses, and bracing and still live in different tonal universes. The difference is not mystical. It’s density, stiffness, and damping. It’s radiation ratio. All else equal, higher R-value wood produces a crisper, more articulate sound. You hear it in the attack, in the way notes separate, in how cleanly the instrument speaks. That gap does not close with time. Bad wood doesn’t open up into great wood. It just ages.
This is why I’ve come to believe that most of what players describe as “opening up” has far more to do with drying than with vibration. Wood, finishes, and adhesives are not chemically static at the moment a guitar is strung. Even well-seasoned tonewood still contains bound moisture, residual volatiles, and extractives. Finishes and glues continue curing. Over time, especially in the early life of an instrument, these constituents slowly migrate and leave the system. Mass decreases slightly while stiffness remains largely unchanged, and internal damping drops. When that happens, the effective radiation ratio of the plate increases and the guitar becomes more efficient at turning string energy into sound. That’s not romance. That’s mass normalization.
Torrefaction makes this easier to see. What torrefaction does chemically over hours, natural aging does physically over years. It removes volatiles, lowers equilibrium moisture content, reduces density, and nudges stiffness-to-weight in the right direction. The reason torrefied guitars often sound “older” right away isn’t mysterious, they’ve simply skipped part of the drying curve. If vibration alone were responsible for opening up, torrefaction wouldn’t work nearly as consistently as it does.
There’s another observation that’s hard to ignore once you’ve seen it enough times: the first day a guitar is strung is often the worst it will ever sound. By the second day it’s noticeably better. After a week, you usually have a clear picture of its core voice. After that, changes slow dramatically. That timeline doesn’t match a vibration-training theory. If vibration were the primary driver, playing time would dominate. Instead, calendar time dominates early on.
What does match that timeline is stress redistribution under static load. When a guitar is strung, it’s forced into a new mechanical equilibrium. Internal stresses from construction are suddenly activated. Glue lines, braces, plates, and rims are all asked to cooperate under load. Over time, viscoelastic creep allows stresses to redistribute, micro-slip at interfaces reduces frictional loss, and damping drops a little. The system settles. This process is real, but it’s bounded. It plateaus relatively early and doesn’t transform the instrument; it simply removes inefficiencies. Vibration plays a role here, but it’s a secondary one. It can help overcome static friction and slightly accelerate settling, but it cannot create tone that isn’t already latent in the material. Think of vibration as a catalyst, not the reaction.
This framework explains something builders tend to know quietly but rarely say outright: great guitars don’t become great, they reveal what they already were. A guitar built with exceptional material sounds promising early, stabilizes quickly, and improves subtly and predictably. A guitar built with mediocre material may loosen a bit, warm up, or get louder, but it never acquires true clarity or definition. Time doesn’t grant permission slips. That’s why vintage greatness clusters where it does. Those instruments weren’t transformed by decades of playing; they were built from extraordinary wood, and time simply stripped away losses.
Seen this way, the goal of building shifts. This is also where my own design philosophy lives. I don’t build guitars with the expectation that they will need years of playing to become themselves. I design them to be open in sound from the beginning; low damping, efficient energy transfer, and material choices that are already near their long-term equilibrium. Instead of hoping an instrument will age into itself, the better aim is to start as close to equilibrium as possible: select material that’s already stable, control mass deliberately, manage damping, and lock in boundary conditions intelligently. A guitar built this way should sound closer to its mature state from the beginning and change less over time. Consistency replaces mythology.
Opening up isn’t a guitar learning how to sing. It’s a guitar shedding what was holding it back. Once you strip away the folklore, what remains is simple, measurable, and deeply familiar to anyone who’s been paying attention. Good guitars don’t age into greatness. They age into efficiency.
