D'Addario J4603C Single Guitar String

Composite G String for Classical Guitar

The D'Addario J4603C Pro-Arte Composite is a single replacement string designed for the third (G) position on a classical guitar. It belongs to the Pro-Arte Composite line, which pairs clear nylon treble strings with composite core basses for a richer, more projecting low-end response. The composite G is denser and stronger than traditional nylon, which allows a smaller diameter and a smoother transition between the bass and treble sections of the instrument. This hard tension variant provides bold tone and strong projection for live performance, studio recording, and classical repertoire. Drawn to exacting specifications at the New York production facility, it carries the same quality control as the full EJ46C set it comes from.

Technical Specifications

• String Position: 3rd (G3)
• Number of Strings: 1
• Material: Composite
• Tension: Hard — 13.000 lbs
• Gauge: .037" / 1.06 mm
• End Type: Tie-end
• Finish: Coated
• Compatible With: Classical Guitar
• Made In: USA

Who It's For

The J4603C is the right choice for classical guitarists who need a replacement G string for their Pro-Arte Composite set. It suits players who prefer the brighter, more projecting sound of composite over traditional nylon on the third string position. Hard tension makes it a natural fit for stronger-fingered players and those seeking a fuller, louder response in ensemble or solo settings. It also works well as a spare for testing the composite G option before committing to a full restring of the EJ46C set.