D'Addario J4405 Single Guitar String

Pro-Arte Single Classical String for Replacement and Custom Builds

The D'Addario J4405 is a single A (5th string) replacement from the Pro-Arte nylon classical guitar line, the most popular nylon string set in the world. Wound with silver-plated copper over a multi-filament nylon core, this Extra-Hard Tension string gives classical players the brighter, more dynamic response and stronger projection that the Pro-Arte range is known for. It is the ideal choice when one string on an existing set has worn out or broken, or when building a customized tension set that mixes tensions to suit a particular instrument. All D'Addario strings are designed, engineered, and manufactured in the USA at the company's New York production facility.

Technical Specifications

• String: A (5th string)
• Number of Strings: 1
• Hardness: Hard
• Tension: Extra-Hard
• Material: Silver-plated copper winding over multi-filament nylon core
• Winding Type: Round Wound
• Ending: Tie end
• Coating: Uncoated
• Compatible With: Classical Guitar
• Made in: USA

Who It's For

The D'Addario J4405 Pro-Arte single string is the right choice for classical guitarists who need a replacement A string for an existing Pro-Arte Extra-Hard Tension set, or for players building a custom tension combination to match a specific instrument's response. Extra-Hard Tension suits players who want stronger projection, fuller volume, and a more resistant feel under the right hand, particularly in ensemble or recital settings where the guitar needs to carry over other instruments. It is also a practical spare to keep in a case for quick repairs during practice, lessons, or performances. The tie-end construction fits traditional classical guitars with slotted bridges.