D’Addario Phosphor Bronze Acoustic Guitar Strings

Medium (13-56) EJ17, EJ17-3D

Powerful Projection with Rich, Full-Bodied Tone

EJ17 phosphor bronze strings deliver robust volume and deep bass response with enhanced midrange clarity. The ideal choice for players who need maximum projection and a bold, articulate tone from their acoustic guitar.

Technical Specifications
String Type	Phosphor Bronze Wound Acoustic
Gauge Configuration	Medium (13-17-26-35-45-56)
Core Material	Hex-shaped steel core
Winding Material	Phosphor bronze (92% copper, 8% tin)
Total Tension	189.9 lbs (Standard Tuning)
Packaging	Single set, 3-pack options available
Manufacturing	Made in USA, ISO 9001 Certified
Recommended For	Strong projection, drop tunings, dreadnought guitars

String Gauges

.013High E.017B.026G.035D.045A.056Low E

Key Features

Premium Phosphor Bronze

92/8 copper-tin alloy provides warmer, more complex tones than standard bronze with enhanced midrange presence and extended lifespan.

Hexagonal Steel Core

Precision hex core ensures maximum winding contact for superior tuning stability, sustain, and accurate intonation.

High-Tension Design

Medium gauges (13-56) deliver powerful projection and robust tone ideal for strumming and flatpicking.

US Manufacturing

Crafted in the USA using ISO 9001-certified processes with four generations of string-making expertise.

Precision Winding

Computer-controlled winding tension ensures uniform response across all strings for balanced performance.

Bold Acoustic Voice

Full-bodied tone with strong bass response and sparkling highs that cuts through in ensemble playing.

Maximum Projection with Rich Harmonic Content

Professional-grade medium gauge Powerful phosphor bronze tone Studio-quality performance