soundbox
/ˈsaʊndˌbɑks/
noun
- The hollow part of a stringed musical instrument (such as a violin or guitar) that amplifies the sound.
- A crack in the soundbox can ruin the instrument's resonance.
- The luthier carved the soundbox from a single block of wood.
- The guitar's soundbox is made of spruce and rosewood for a warm tone.