D'ADDARIO EJ37 12-STRING PHOSPHOR BRONZE ACOUSTIC GUITAR STRINGS MEDIUM TOP/HEAVY BOTTOM 12-54
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Manufacturer Information
D'addario And Co
https://www.daddario.com
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D'Addario Europe Ltd
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A Gauge Designed to Make a 12-String Sing
The D'Addario EJ37 set was designed for guitarists who want to retain the playability of a medium gauge on the treble pairs, while benefiting from firmer and more powerful basses thanks to the heavy gauge bass strings. The result: a 12-string that projects more, with a better-controlled low end, particularly appreciated in rhythmic accompaniment, sustained tunings, and dynamic fingerstyle playing.
Phosphor Bronze: Warmth, Brightness, and Balance
Introduced by D'Addario as early as 1974, phosphor bronze has become a standard for achieving a rich and balanced acoustic sound. On a 12-string guitar, it helps maintain clarity in the double courses while adding musical brightness and natural warmth. The phosphor bronze winding, combined with the steel hex core, promotes precise attack and excellent intonation over time.
Technical specifications
| Format | standard |
| Type of cord attachment | Without |
| Category | acoustic |
| Nbr of strings | 12 |
| Color | Bronze |
| Model | D'Addario And Co EJ37 |
| Instrument | acoustic guitar 12-string |
| Alloy | phosphor bronze (wound strings) |
| Gauge | Medium Top / Heavy Bottom |
| Tension/Feel | medium trebles, heavy basses |
| Packaging | eco-friendly and corrosion-resistant |
| Manufacture | USA |
| Sizes | Pure steel.012/.012,.016/.016, Phosphor bronze winding.025/.010(p),.032/.015(p),.042/.022(w),.054/.030(w) |
| Feature | 12-string set with wound octave (A) string to enrich the lower spectrum |
Questions frequently asked
What is the gauge of D'Addario EJ37 strings for 12-string guitar?
The set features a Medium Top/Heavy Bottom gauge of 12-54, with medium-type trebles and heavier bass strings.
Are these strings suitable for a 12-string acoustic guitar?
This model is designed for 12-string acoustic guitars. It includes a wound octave A string, created to enrich the lower spectrum.
What tone does phosphor bronze provide on a 12-string?
Phosphor bronze winding delivers a balance between warmth and brightness. This composition helps maintain clarity in the doubled choruses on a 12-string guitar.
Why choose a heavy gauge on the bass strings of a 12-string?
Heavy bass strings reinforce the low-end sustain and projection. This setup is recommended for rhythmic accompaniment, stable tuning, and dynamic fingerstyle playing. The hex core steel wire promotes precise attack and good intonation.
Are EJ37 strings made in the United States?
The production of this D'Addario And Co EJ37 set is carried out in the USA, with eco-friendly packaging that resists corrosion.



