Detail 01
Phosphor bronze
A bronze alloy wrap used on acoustic strings; it's the standard acoustic winding rather than an electric steel.
Product detailSKU #1274034477871
D'AddarioEJ37 12-String Phosphor Bronze Acoustic Guitar Strings - Medium Top Heavy Bottom
1/7
Independent shopping perspective
The Korena take
Phosphor bronze 12-string acoustic set with a medium top and heavy bottom. For players who want stronger low end under the paired octaves.
Strong match
Who this is for
- 12-string acoustics needing more weight in the bass courses
- Strummers who want the low strings to hold up
- Replacing a dull factory 12-string set
Consider the trade-offs
When to look elsewhere
- 6-string acoustics — half the set is unused
- Electric guitars, since bronze won't drive magnetic pickups well
- Players wanting the lightest possible fretting effort
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
12-string set
Includes all paired courses with octave strings, so you don't assemble a set from singles.
Detail 03
Medium top, heavy bottom
Thinner treble strings with thicker bass strings, so lead-side bending stays easier while the low courses stay firm.
Detail 04
Medium gauge overall
More tension than a light set, which pulls harder on the neck and top of a 12-string.
Detail 05
Acoustic guitar strings
Meant for a hollow, unamplified body; they rely on the top vibrating rather than pickups.
Final check
Know before you order
- 0112-string necks carry a lot of tension — confirm yours handles medium gauge
- 02Restringing twelve strings takes longer and needs more winding
- 03No winder, cutters, or bridge pins included
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What does medium top heavy bottom mean?
The treble strings are medium gauge and the bass strings are heavier. You get a firmer low end without making the high strings stiff to fret.
02Will these work on a 6-string?
No. It's a 12-string set with paired and octave strings. Buy a 6-string acoustic set instead.
03Are these too heavy for my 12-string?
Medium gauge adds tension over a light set. If your guitar is older or lightly built, check with a tech before going up in gauge.
04Can I put these on an electric?
They're phosphor bronze acoustic strings. Use electric strings on an electric guitar.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Medium Top Heavy Bottom
