SKU: 10034100522

Martin Authentic Acoustic SP Phosphor Bronze 11-52 Acoustic Guitar Strings

Sale price$13.50 Regular price$15.00
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Ships within 48 hours · Estimated delivery Oct 2 - Oct 7

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Description

Martin Authentic Acoustic SP Phosphor Bronze 11-52 Acoustic Guitar StringsMartin Authentic Acoustic Superior Performance (SP); the flagship, and the coveted king of acoustic guitar strings. These strings are made by the top acoustic guitar brand in the world, ie., we know what their MO is! Martin SP strings are made in their own dedicated strings factory in Navojoa, Mexico. Their quality control is flawless with every set coming out just a good as the last, and then packed in modern, long shelf life flow foil wrappers. The

Martin Authentic Acoustic Superior Performance (SP); the flagship, and the coveted king of acoustic guitar strings. These strings are made by the top acoustic guitar brand in the world, ie., we know what their ‘MO’ is!

Martin SP strings are made in their own dedicated strings factory in Navojoa, Mexico. Their quality control is flawless with every set coming out just a good as the last, and then packed in modern, long shelf-life ‘flow’ foil wrappers.

The core of each string is high-tensile steel for strength and power which is tin-plated to add corrosion resistance. This gives all sets (whether phosphor or 80/20 bronze) bold and powerful fundamental tones which genuinely enhance any acoustic guitar we’ve tried them on. Premium bronze alloys are used for the wrap wire at specific ratios to provide the best acoustic tone possible for your guitar.

80/20 Bronze - bold, bright, brilliant
Phosphor Bronze - added lo-mid warmth, smoother highs

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 10034100522

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4.7 ★★★★★
Based on 24 reviews
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Y
Verified Purchase
Y K
Los Angeles, US
★★★★★ 5
Comfortable
Material Type: Black - 2 Pairs, Size: X-Large, Material Type: Black - 2 Pairs, Size: X-Large
I have very sensitive skin, so I usually need to wear socks at all times. These are especially comfortable because they don’t cover the toes, which helps with temperature control. The material is well-balanced—not too thick or too thin—and has just the right amount of stretch. I also appreciate the large traction area, which adds stability. Another plus is that they are completely fragrance-free.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
P
Verified Purchase
Pudatane
Battle Creek, US
★★★★★ 5
Great Heel Socks
Material Type: Black - 3 Pairs, Size: Large
I don't know how they work but it's wonderful. I've had rough heel problems for a long time. I wear these everyday and my heels are not rough. They're not baby bottom smooth, but they are not ever going to be. These heel socks also oncce they are properly positioned snap onto the heel. Properly positioning them is easy when you put them on your foot with the heel cup in the correct orientation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
B
Verified Purchase
beachx
Alexandria, US
★★★★★ 3
Too small
Material Type: Gray - 3 Pairs, Size: X-Large
Too tight! Even size large used for a man with smaller feet is too tight. Also, no instructions for use or care.
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Reviewed in the United States on May 21, 2026
J
Verified Purchase
Jo-Ann Epstein
Lowell, US
★★★★★ 5
Good fit
Material Type: Black - 3 Pairs, Size: X-Large
My husband just started using these and they feel comfortable. Hasn't used them long enough to see if his heels are better. He has a high arch so I bought him the XL and they fit perfectly.
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Reviewed in the United States on April 24, 2026
M
Verified Purchase
M.R.
Chelsea, US
★★★★★ 5
No more painful cracked heels! These really do work!
Material Type: Black - 3 Pairs, Size: X-Large
These really do work well. This is one of the first winters that I have not experienced painful, cracked heels. They are long lasting, and definitely make my heels smoother and softer after wearing them. For the first few times wearing them I simply went with the moisturizer embedded in them. After a few uses I then covered my heels with Aquaphor Advanced Therapy Healing Ointment. This worked even better, and I would recommend it. I am very glad I bought these. Of note, I have really big feet that are quite wide and the XL are a little snug but not uncomfortably so. I use them overnight, but also have worn them under socks and they work fine.
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Reviewed in the United States on February 3, 2026

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