The Martin MA540FX Authentic Acoustic Flexible Core strings are a light-gauge phosphor bronze set built around an unusual design choice: a thinner core wire matched with heavier wrap wire. That combination gives you the feel of a lighter string while still delivering the full, balanced tone you'd expect from a standard light set. If you've ever wanted easier bends and lower finger fatigue on an acoustic without dropping down to an extra-light gauge, this is a practical way to get there.
These are a 6-string acoustic set gauged .012–.054 — the same overall range as a standard light set, but with that flexible core construction doing the heavy lifting. The wrap wire is 92/8 phosphor bronze, which is Martin's standard alloy for their Authentic Acoustic line. The core is steel, wound in a round configuration. Martin labels this set "Tommy's Choice," a nod to guitarist Tommy Emmanuel, who has used the Flexible Core strings as his go-to. These strings are not coated or treated, so they have the open, direct feel of traditional uncoated strings.
Product Features:
- Authentic Acoustic Flexible Core construction — thinner core wire with heavier wrap wire
- 92/8 phosphor bronze wrap wire, steel core
- Round wound winding type
- Light gauge: .012, .016, .025, .032, .042, .054
- For 6-string acoustic guitar
- Uncoated — traditional open feel and response
Brand: Martin
Model: MA540FX Authentic Acoustic Flexible Core
SKU: 41Y19MA540FX
Condition: New
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