Wiktionary
sound boxes
n. (sound box English)
Usage examples of "sound boxes".
Some sort of keyboard, a music comp, a couple of guitars, sound boxes.
The curved headboard was a control panel fitted with screens and toggles and tall grills like hi-fl sound boxes, and a couple of slots big enough to deliver drinks or sandwiches.
The sound of music, drawn almost entirely from the weird, husky sound boxes of a variety of magnetonic instruments, grew louder.
To assist those individuals in their adaptation to the new systems, they instructed the Technicians to construct sound boxes such as this.