Dual 7.5W detachable speakers · TWS stereo · surface resonance audio · Bluetooth 5.4 · USB-C charging · 8-hour playback
DuoSound is a surface-transducer audio device that replaces the traditional speaker cone with whatever flat surface the user places it on, converting tables, windows, walls, boxes, vehicle panels, and other everyday objects into sound-producing diaphragms. The core technology is a voice-coil transducer — the same electromechanical principle that drives conventional speakers, but instead of moving a paper or plastic cone, it vibrates the mounting surface directly through physical coupling. The acoustic result depends on the surface material: a solid wood desk resonates with the warmth and body of a wooden speaker cabinet, a large glass window produces bright, clear treble with wide dispersion, a hollow cardboard box adds surprising bass depth from the resonant cavity, and a vehicle door panel turns the entire car body into an enclosure. This surface-dependent character means DuoSound is less about reproducing a flat reference response and more about creatively engaging with the acoustic properties of the environment — the user selects a surface as deliberately as a musician selects an instrument. The portability of the transducer — small enough to pocket — combined with the ubiquity of usable surfaces means a speaker is always available wherever a flat object exists, eliminating the bulk and battery anxiety of carrying a dedicated portable speaker for casual listening scenarios.
