3-inch satellite box with 15W subwoofer. It's just right for surround sound. Satellite box design Satellite box design Satellite box design Satellite box design It uses a dual-unit combination. Subwoofer is a common name or abbreviation for everyone. Strictly speaking, it should be: subwoofer. Heavy bass is actually a term for bass music in electronic music. This word was innovatively developed for the first time, and the word subwoofer, a localized word, was pioneered by Mailan (now Maibo).