Detail 01
Phosphor bronze
Warmer and darker than 80/20 bronze, with a longer tonal life before going dull. The common all-purpose acoustic wrap.
Product detailSKU #1315669875493
GHSPhosphor Bronze Medium Acoustic Guitar Strings (13-56)
Independent shopping perspective
The Korena take
Medium-gauge phosphor bronze acoustic strings, 13-56. For flatpickers and strummers who want volume and low-end push over easy bending.
Strong match
Who this is for
- Bluegrass flatpicking where volume and note separation matter
- Heavy strumming on a dreadnought or jumbo body
- Players in standard tuning wanting a fuller low end
Consider the trade-offs
When to look elsewhere
- Fingerstyle players who want light tension and easy attack
- Small parlor or vintage guitars not braced for medium tension
- Anyone with hand strength or fretting-comfort concerns
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
Medium gauge, 13-56
Noticeably stiffer than lights. More volume and bass, harder to bend and press, more tension on the neck.
Detail 03
56 on the low E
Heavy bottom string. Drives the top harder for strumming, but can overpower a small-bodied guitar.
Detail 04
13 on the high E
Thick treble string. Stronger fundamental and less breakup under a pick, but bends take real effort.
Final check
Know before you order
- 01Moving up from lights usually needs a truss rod and action adjustment
- 02Confirm your guitar is rated for medium tension before stringing up
- 03One set only — no picks, winder, or spare strings included
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can I put these on any acoustic?
Not always. Medium gauge puts more tension on the top and neck. Older, small-bodied, or lightly braced guitars are often built for lights only.
02What is the difference between phosphor bronze and 80/20?
Phosphor bronze is warmer and darker with a longer usable life. 80/20 is brighter and more crisp when new but fades faster.
03Do I need a setup after switching from lights?
Usually yes. Higher tension raises action and pulls the neck, so the truss rod and sometimes the saddle need adjusting.
04Will these work on a 12-string?
No. This is a six-string set. A 12-string needs a dedicated set with the octave and unison pairs.
