Is “Soundbox” a Scrabble word?
Yes
SOUNDBOX
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Soundbox
noun
1.The open chamber (resonator) of a stringed musical instrument, which intensifies its tone.