The backpack audio is an outdoor-oriented product achieved with super-thin flat panel plane wave speakers, and amplifier and remote control built-in.

The flat panel speakers used in the system are made from world patents pending Multi-All Micro-transducer Array (MCMA) technology by FPS Inc. in Japan, which are with conspicuous directivity and the least attenuation of audibility. Utilizing technologies and features and building the speaker drivers into the backpack strap, the sound image is stabilized around the listener’s head, which offers the listener to enjoy the same stereo affection as home stereo. Sound out of conventional cone paper type speakers radically diffuse and the sound image does not steadily stay around the listener’s head and therefore, the same effect like the MCMA speakers cannot be achieved. Further, the system, being different from earphones or headphones, does not shut out outside sounds and its safety is watched by various industries or adopting the MCMA speakers, such as for communication equipment at construction sites, mobile phone hands free tools, etc.