Martin MA540 Authentic Phosphor Bronze Superior Performance Acoustic Guitar String - .12-.54 universal-audio audio-interface Electrical impedance: 200 Ohms

Electrical impedance: 200 Ohms

and even timpani

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Martin MA540 Authentic Phosphor Bronze Superior Performance Acoustic Guitar String - .12-.54 universal-audio audio-interface Electrical impedance: 200 OhmsMartin MA540 Authentic Phosphor Bronze Superior Performance Acoustic Guitar String . 12 . 54 Overview: Martin Authentic Acoustic Superior Performance SP strings feature higher tensile strength and tin plated core wire on all six strings that enable a fuller and more balanced tone, quicker response and increased tuning stability. Our impeccable standards for acoustic guitar tone are embedded in our string design and precision manufacturing process.