Bang & Olufsen strives to design environmentally friendly products. Products are exhaustively mechanically tested before they are released for production, to ensure high-quality throughout their lifetime. They are tested to ensure they can withstand cold, heat, vibrations, sunlight, dust, etc. Since 1925, Bang & Olufsen has been synonymous with the art of acoustic perfection. To this day, their craftsmen still calibrate and tune every loudspeaker model by hand.