Martin MA140PK3 Authentic Acoustic (3 Packs) Guitar Strings - Light 12-54 cracked-mirror-finish Features two (2) side by

Features two (2) side by side lift-out trays

Internal Software: Internal Software upgrade via included firmware updater application via USB or ethernet

which triggers the PS-REL

but have restricted space - whether that's on stage or in your project studio

For traditionalists

Martin MA140PK3 Authentic Acoustic (3 Packs) Guitar Strings - Light 12-54 cracked-mirror-finish Features two (2) side byThese strings are engineered with the performer in mind and they will always stand up to rigorous practice and performance schedules. Starting with Martin's highest tensile strength core wire, then tin plate it on all six strings for added corrosion resistance; because what you don't see matters! When coupled with their highest quality wrap wire you get consistent true tone that you can count on song after song. Available in 80 20 Bronze and 92 8