The Aquila 19C is the normal tension set in the Alabastro line, Aquila's classical guitar string with Super Nylgut trebles and Alabastro basses. Super Nylgut is Aquila's refined gut substitute: it has the warm, complex, slightly woody tone of gut with rich overtones, but it stays in tune, resists humidity, and has a smooth, polished surface. The Alabastro basses are silver-plated copper wound on a multifilament Nylgut core, which keeps the bass register warm and well matched to the trebles.
Aquila is a family-run string maker in Vicenza, Italy, best known for inventing Nylgut, a synthetic material that reproduces the density, feel, and sound of real gut strings without gut's cost, fragility, or sensitivity to humidity. The 19C is the right starting point for most guitars; the 20C adds tension and volume, and the 97C is lighter.
Note: Nylgut trebles are slightly thicker than nylon at the same pitch, so some guitars may need a small nut-slot adjustment.
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