I build double basses, like all of my instruments, starting from pieces of the best raw wood, using the Alpine spruce for the soundboard and generally maple or poplar wood for the sides and back.

Five strings double bass, maple wood back

Double bass, back made of a single piece of poplar wood

Flat-bottomed double bass, bands and back made of maple

Electroacoustic double bass, fir board, bands and back of a single piece of mahogany