Martin 18CM0243M CL AD Muscle Tank Black (M) driver Optional lithiumion battery pack offers

Optional lithiumion battery pack offers more hours of playing time between charges than a standard 9V battery

The MS9212 offers pro-level features

External dimensions (WxDxH): 16

Frequency response: 40 to 20

as well as M8 hole spacings of 115mm

Martin 18CM0243M CL AD Muscle Tank Black (M) driver Optional lithiumion battery pack offersThe Martin Muscle Tank is your new go to for rocking out and working out in style. This sleeveless black tank, featuring our iconic white logo, is crafted from 100% combed ringspun cotton, making it incredibly soft and comfortable. And with a slightly slimmer body, it's designed for a sleek, no fuss look. Whether you're jamming on stage or hanging out in the crowd, the Martin Muscle Tank ensures you look as cool as the music sounds. 4. 3 ounce, 100%