Phosphor Bronze Acoustic Guitar Strings

Phosphor bronze wrap on a steel core. Warm, full tone with balanced response across a wide range of playing styles.

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S.I.T. Phosphor Bronze Acoustic Guitar Strings – 9–46 (P946 Ultra Light)
Phosphor Bronze Acoustic Guitar Strings – 9–46 (P946 Ultra Light) Sale price$8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 10–48 (P1048 Extra Light)
Phosphor Bronze Acoustic Guitar Strings – 10–48 (P1048 Extra Light) Sale priceFrom $8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 11–50 (P1150 Pro Light)
Phosphor Bronze Acoustic Guitar Strings – 11–50 (P1150 Pro Light) Sale priceFrom $8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 11–52 (P1152 Custom Light)
Phosphor Bronze Acoustic Guitar Strings – 11–52 (P1152 Custom Light) Sale price$8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 12–54 (P1254 Light)
Phosphor Bronze Acoustic Guitar Strings – 12–54 (P1254 Light) Sale priceFrom $8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 12–56 (P1256 Bluegrass)
Phosphor Bronze Acoustic Guitar Strings – 12–56 (P1256 Bluegrass) Sale price$8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 13–56 (P1356 Medium)
Phosphor Bronze Acoustic Guitar Strings – 13–56 (P1356 Medium) Sale price$8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – Nashville Tuning (P1025NT)
Phosphor Bronze Acoustic Guitar Strings – Nashville Tuning (P1025NT) Sale price$5.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 16–70 (P1670B Baritone)
Phosphor Bronze Acoustic Guitar Strings – 16–70 (P1670B Baritone) Sale price$8.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 9–46 12-String (P12946 Extra Light)
Phosphor Bronze Acoustic Guitar Strings – 9–46 12-String (P12946 Extra Light) Sale price$14.99
S.I.T. Phosphor Bronze Acoustic Guitar Strings – 10–46 12-String (P121046 Light)
Phosphor Bronze Acoustic Guitar Strings – 10–46 12-String (P121046 Light) Sale price$14.99

More About

About Phosphor Bronze

Phosphor Bronze is the standard acoustic set and the widest range we make. A phosphor bronze wrap over a high carbon steel hex core gives a warm, rich tone with clear highs, a full low end and even response across all six strings. If you don't know where to start with an acoustic guitar, start here.

The line runs from .009 all the way to .016, and covers six-string, 12-string, baritone and Nashville tuning, so most players find their gauge inside this one collection.

Choosing a gauge

.012–.054 (P1254 Light) is the industry standard and the safest first choice — enough volume for strumming, still comfortable for fingerstyle. For an easier feel, .010–.048 (P1048 Extra Light) and .009–.046 (P946 Ultra Light) feel softer, and .011–.050 (P1150 Pro Light) sits between the two. If you want a light top with a heavier bottom, .011–.052 (P1152 Custom Light) and .012–.056 (P1256 Bluegrass) are built that way, and Bluegrass is the flatpicking set. For maximum volume and projection, .013–.056 (P1356 Medium) is the heaviest six-string in the line.

Outside standard tuning, .016–.070 (P1670B Baritone) is for extended scale guitars and lower tunings, and P1025NT is a high-strung Nashville tuning set for layering under a standard-tuned guitar. Twelve-string players have .009–.046 (P12946 Extra Light) and .010–.046 (P121046 Light).

Gauges

Set Gauges
.009–.046 — P946 Ultra Light .009 .012 .018 .026 .032 .046
.010–.048 — P1048 Extra Light .010 .014 .020 .030 .036 .048
.011–.050 — P1150 Pro Light .011 .014 .022 .030 .036 .050
.011–.052 — P1152 Custom Light .011 .015 .022 .032 .042 .052
.012–.054 — P1254 Light .012 .016 .025 .032 .042 .054
.012–.056 — P1256 Bluegrass .012 .016 .026 .036 .046 .056
.013–.056 — P1356 Medium .013 .017 .026 .036 .046 .056
.016–.070 — P1670B Baritone .016 .022 .030 .048 .060 .070
Nashville tuning — P1025NT .010 .014 .009 .012 .017 .025
12-string .009–.046 — P12946 Extra Light .009 .012 .020 .026 .036 .046
.009 .012 .009 .012 .016 .025
12-string .010–.046 — P121046 Light .010 .014 .022 .030 .038 .046
.010 .014 .009 .012 .017 .025

On the 12-string sets the first line is the main course and the second is the paired course — unison on the top two strings, octaves on the bottom four. The Nashville set is that paired course on its own.

How Phosphor Bronze compares to our other acoustic sets

Phosphor Bronze is the warm, balanced middle of our acoustic range and the usual starting point. Golden Bronze 80/20 is brighter and crisper. Royal Bronze uses the same gauges with a different winding for a fuller, more even and longer-lasting set. CRT Coated Phosphor Bronze is this string with corrosion resistance added. American Roots Monel is drier and more vintage, and Semi-Flat Silencers 80/20 cut finger noise.

Frequently asked questions

What are phosphor bronze guitar strings?

Phosphor bronze strings use a 92/8 phosphor bronze wrap over the core. On our sets that core is high carbon steel hex. Phosphor bronze gives acoustic guitars a warm, rich tone with clear highs and a full low end, and it is the most common choice for acoustic guitar.

Phosphor bronze vs 80/20 bronze: which should I choose?

Phosphor bronze is warmer and more balanced. 80/20 bronze is brighter and crisper, especially when new. If you are not sure, start with phosphor bronze. Compare them in our phosphor bronze vs 80/20 guide or try Golden Bronze 80/20.

What gauge acoustic strings should I use?

.012–.054 (P1254 Light) is the most common starting point. For an easier feel, try .010–.048 (P1048 Extra Light) or .011–.050 (P1150 Pro Light). For more volume and projection, .013–.056 (P1356 Medium).

Do you make coated phosphor bronze strings?

Yes. CRT Coated Phosphor Bronze is the same string with added corrosion resistance for longer life.

Do you make phosphor bronze strings for 12-string and baritone acoustic?

Yes. We make two 12-string sets (P12946 and P121046), a baritone set (P1670B) and a Nashville tuning set (P1025NT).

Made in the USA.