D'Addario PB045 Guitar string

Phosphor Bronze Single String for Acoustic Guitar

The D'Addario PB045 is a single replacement string designed for acoustic guitar, offering the warm, bright tone that phosphor bronze is known for. At .045" gauge (1.14 mm), it serves as the standard low A string in most light and custom string sets. Built with a hex steel core and round-wound phosphor bronze wrap, this string delivers the full-bodied acoustic character D'Addario strings are known for. The ball-end design fits standard acoustic guitar bridges, making it a straightforward replacement for a broken or worn string. A coated finish helps extend string life by protecting against moisture and grime.

Technical Specifications

• Gauge: .045" / 1.14 mm
• Material: Phosphor Bronze
• Core: Hex steel core
• Winding: Round Wound
• Ending: Ball End
• Finish: Coated
• Compatible With: Acoustic Guitar

Who Is This String For?

This single string is ideal for acoustic guitar players who need to replace a broken or worn low A string without buying a full set. It also works well for players building custom gauge sets by mixing different string weights. The .045" gauge fits naturally as the low A in light and custom acoustic configurations. Phosphor bronze suits a wide range of acoustic styles, from fingerstyle to flatpicking and strumming. The coated finish makes it particularly useful for gigging musicians who want longer string life between changes.