Martin MM13 Retro Acoustic Guitar Strings - Medium 13-56 gio-rx great sound and playability

great sound and playability

7-string guitar with longer 27" scale length to accommodate lowered tunings

Sequential OB-6 can sit ready for operation

Output Impedance: ¼" unbalanced: 10k Ohms

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Martin MM13 Retro Acoustic Guitar Strings - Medium 13-56 gio-rx great sound and playabilityMartin Retro strings are the real deal. Not an imitation. With Martin Retro strings, you get one tough set that offers true, consistent tone and sounds like nothing else on the market. Martins solid nickel copper alloy blend provides a reduced pick attack that allows the guitars tonewoods to be heard, not overshadowed. Martins proprietary Monel wrap wire is naturally corrosion resistant, so you can play them for a long time with nothing to get in the