D'Addario J4505C Single Guitar String

Replacement A String for Pro-Arte Composite Classical Sets

The D'Addario J4505C Pro-Arte Composite single string is built as a direct replacement for the 5th (A) string in the EJ45C Pro-Arte Composite classical guitar set. It uses the same silver-plated copper wrap and multi-filament composite core found in the full set, so swapping in a single replacement keeps the bass section tonally consistent rather than mixing a nylon A with composite D, G, and E strings. Rated to last 2-3 times longer than traditional classical strings thanks to a composite core that is 30% denser and 36% stronger than nylon, this single is the right choice for classical players whose A string has broken or worn out before the rest of the set, or for anyone who wants to keep a spare on hand.

Technical Specifications

• String Position: A (5th string, A2)
• Gauge: .035" / 0.89 mm
• Tension: 14.7 lbs (Normal)
• Wrap Material: Silver-Plated Copper
• Core Material: Multi-filament Composite
• Winding Type: Round Wound
• End Type: Tie-End
• Compatible With: Classical Guitar
• Made In: USA (New York production facility)

Who It's For

The J4505C is the right choice for classical guitarists who play a Pro-Arte Composite EJ45C set and need a single replacement A string without buying a whole new set. Players who prefer the normal tension feel — D'Addario's best-selling tension, picked for its balance of rich tone, comfortable feel, and dynamic projection — will appreciate the elevated bass response that the composite core delivers compared to standard nylon basses. Tie-end construction fits traditional classical guitars with tie-block bridges, and the silver-plated copper wrap produces a warm, projecting low-end suited to live performance, studio recording, and classical repertoire.