US
D'Addario

D'Addario XT Phosphor Bronze Single Acoustic String .039

  • .039 gauge single string
  • XT coated phosphor bronze, round wound
  • High carbon steel core, Fusion Twist
  • 131% better tuning stability claim
  • Made in USA

Updated 5 days ago · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A single coated phosphor bronze string for replacing a broken one or building a custom set. It is one string only, so check which position your set needs.

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ASIN: B08T1RCCHVCategory: Acoustic Guitar Strings

Sizes Available

.023 gauge.024 gauge.025 gauge.026 gauge.027 gauge.028 gauge.029 gauge.032 gauge.035 gauge.039 gauge.042 gauge.047 gauge.048 gauge.052 gauge.056 gauge.060 gauge.070 gauge

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Overview

Gig bags and guitar cases that need a spare for the string that breaks mid set are where this D'Addario single belongs. It is a coated phosphor bronze, round wound acoustic string on a high carbon steel core.

Buying one string instead of a full set saves a restring when a single string snaps. XT coating extends life while keeping tone close to uncoated. Its position in a set depends on your gauge choice.

Who it's for

Gigging players who keep spares and tinkerers who build their own sets. Anyone restringing the whole guitar should buy a full set.

Pros and cons

Pros
  • Replace one string, not six
  • Coated for longer life
  • Break resistant core
  • Strong tuning stability
Cons
  • Single string only
  • String position not stated
  • Coated feel differs slightly

Performance notes

Fusion Twist and the high carbon core help the string settle and hold pitch, which matters when one new string is played beside worn ones. The coating slows corrosion so it ages more slowly than an uncoated spare.

Specifications

BrandD'Addario
Construction & materials
String Material TypePhosphor bronze, round wound
Material TypeHigh carbon steel core, Fusion Twist
Coating DescriptionXT coated
Warranty & support
Warranty DescriptionReplaced if defective
Other details
String Gauge.039
InstrumentAcoustic guitar
Number of Items1

Frequently asked questions

Is the D'Addario XTPB039 a full set of strings?

No. It is a single .039 gauge string.

Can I mix the D'Addario XTPB039 with other strings?

Yes. D'Addario lists it as a replacement string or for building customized acoustic sets.

Is the D'Addario XTPB039 coated?

Yes. It is XT coated phosphor bronze.