Adjustable strings and an extra-thick wooden sound port for bass compression gives the Minera Line of cajons a wide, dynamic range of highs and lows. Two sets of four micro-coiled metal cajon strings give a snapping snare effect and are adjustable with the included tuning key. These strings are hand-wound in the style of master cajon builder, José "Pepote" Hernández Diaz, and respond with the upmost sensitivity.