Martin Flex Core Strings
Review by Jason J. on 21 Jul 2026 review stating Martin Flex Core Strings These are my go to strings, since they were introduced a few years ago. I only have one critique for Martin: Please change the 1st & 2nd strings. For example: 13 & 17 are too heavy for the medium gauge set. They feel & play too tight, when you compare them to the other strings in the set. If you change them to a 12 & 16, they will match the overall feel & tension of the set.
On Martin MA550FX Flexible Core Phosphor Bronze Acoustic Guitar Med 13-56