{"id":9297720410345,"title":"Martin Era Treated Jason Isbell Acoustic Guitar Strings Phosphor Bronze 12-54","handle":"martin-era-treated-jason-isbell-acoustic-guitar-strings-phosphor-bronze-12-54","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBuilt to achieve unmatched tone and playability, Martin Era™ strings set a new standard for what a phosphor bronze acoustic guitar string can be. Combining the best technologies from the Martin Strings lineup, Martin Era strings feature a patented Lifespan® treatment to protect against corrosion, Flexible Core construction to enhance fretability and comfort, and silk-wrapped ball ends—designed with vintage instruments in mind and as a premium touch that symbolizes Martin’s handcrafted string-making history. The Artist Light version was developed in collaboration with six-time GRAMMY® winner Jason Isbell and features a more traditional SP® core to match his signature guitar sound.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003eGauges: .012, .016, .025, .032, .042, .054\u003cbr\u003e\u003c\/p\u003e","published_at":"2026-06-01T14:37:21-04:00","created_at":"2026-06-01T14:20:42-04:00","vendor":"Martin","type":"Acoustic Guitar Strings","tags":["12-54","13-56","729789707848","Acoustic Guitar Strings","Acoustic Light String","Guitar Strings","Jason Isbell","Light Strings","MA550T","Martin Strings","Medium Light Strings","MJI12","Phosphor Bronze","Strings"],"price":1799,"price_min":1799,"price_max":1799,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":51139313893609,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"MJI12T","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Martin Era Treated Jason Isbell Acoustic Guitar Strings Phosphor Bronze 12-54","public_title":null,"options":["Default Title"],"price":1799,"weight":85,"compare_at_price":null,"inventory_quantity":10,"inventory_management":"shopify","inventory_policy":"deny","barcode":"729789707848","requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/megatonemusic.com\/cdn\/shop\/files\/Martin-Strings-MJI12T-Jason-Isbell-Acoustic-GuitarStrings-12-54-Image-1.jpg?v=1780339011","\/\/megatonemusic.com\/cdn\/shop\/files\/Martin-Strings-MJI12T-Jason-Isbell-Acoustic-GuitarStrings-12-54-Image-2.jpg?v=1780339011"],"featured_image":"\/\/megatonemusic.com\/cdn\/shop\/files\/Martin-Strings-MJI12T-Jason-Isbell-Acoustic-GuitarStrings-12-54-Image-1.jpg?v=1780339011","options":["Title"],"media":[{"alt":null,"id":39871016468713,"position":1,"preview_image":{"aspect_ratio":1.319,"height":2790,"width":3681,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Martin-Strings-MJI12T-Jason-Isbell-Acoustic-GuitarStrings-12-54-Image-1.jpg?v=1780339011"},"aspect_ratio":1.319,"height":2790,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Martin-Strings-MJI12T-Jason-Isbell-Acoustic-GuitarStrings-12-54-Image-1.jpg?v=1780339011","width":3681},{"alt":null,"id":39871016501481,"position":2,"preview_image":{"aspect_ratio":1.319,"height":2790,"width":3681,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Martin-Strings-MJI12T-Jason-Isbell-Acoustic-GuitarStrings-12-54-Image-2.jpg?v=1780339011"},"aspect_ratio":1.319,"height":2790,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Martin-Strings-MJI12T-Jason-Isbell-Acoustic-GuitarStrings-12-54-Image-2.jpg?v=1780339011","width":3681}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eBuilt to achieve unmatched tone and playability, Martin Era™ strings set a new standard for what a phosphor bronze acoustic guitar string can be. Combining the best technologies from the Martin Strings lineup, Martin Era strings feature a patented Lifespan® treatment to protect against corrosion, Flexible Core construction to enhance fretability and comfort, and silk-wrapped ball ends—designed with vintage instruments in mind and as a premium touch that symbolizes Martin’s handcrafted string-making history. The Artist Light version was developed in collaboration with six-time GRAMMY® winner Jason Isbell and features a more traditional SP® core to match his signature guitar sound.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003eGauges: .012, .016, .025, .032, .042, .054\u003cbr\u003e\u003c\/p\u003e"}