1. the hollow body of a stringed musical instrument that amplifies and resonates the sound produced by the strings
2. a compartment or enclosure designed to contain and project sound from speakers or audio equipment

Examples

• The guitar’s soundbox was cracked, affecting its tone quality.
• She carefully polished the violin’s wooden soundbox before the concert.
• The luthier examined the soundbox for any structural damage.
• The stereo’s soundbox produced rich, deep bass tones.
• He built a custom soundbox for his new speakers.
• The mandolin’s small soundbox creates its distinctive bright sound.