Martin Guitars MA550 Acoustic Guitar Strings Bulk 25 Sets Medium (13-56) transparent-blue-burst Max SPL (Calculated): 129 dB

Max SPL (Calculated): 129 dB

Head material/color: Phenolic/Black

and an industry-standard 4-pin TA4F mini-XLR plug on the other

Gain High: +12 dB Red

Martin Guitars MA550 Acoustic Guitar Strings Bulk 25 Sets Medium (13-56) transparent-blue-burst Max SPL (Calculated): 129 dBMartin 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. That's why we make our own. Bulk Boxes of 25 Sets