The Sanwa Supply 400-SP120 is a compact soundbar with a wooden cabinet and built-in battery, released in Japan on 27 November 2025. It measures about 400 x 93.5 x 46 mm and weighs about 1 kg, sized to sit under a PC monitor or a TV with a screen of up to about 102 cm without blocking the screen.
Key specs that matter
Two sealed full-range drivers of 31 x 97 mm work with two passive radiators for a maximum output of 20 W. Inputs are Bluetooth 5.0 with SBC and a 3.5 mm analog jack, and the unit also plays MP3 files from microSD cards or USB memory of up to 32 GB.
Engineering and use context
The internal battery gives about 6 hours of playback and is charged over USB Type-C, and the soundbar can be used while charging. A built-in microphone allows hands-free calls over a Bluetooth connection.