woofer]] Woofer is the term commonly used for a loudspeaker driver designed to produce low frequency sounds, typically from around 40 hertz up to about a kilohertz or higher. The name is from the onomatopoeic English word for a dog's bark, "woof" (in contrast to the name used for speakers designed to reproduce high-frequency sounds, tweeter). Description The most common design is the electrodynamic driver. These use a cone, driven by a voice coil surrounded by a magnetic field. The voice coil and magnet form a linear electric motor. When current flows through the voice coil, the coil moves in relation to the frame according to Fleming's left hand rule, causing the coil to push or pull on the driver cone in a piston-like way. The voice coil is attached by adhesives to the back of the speaker cone. The resulting motion of the cone creates sound waves as it moves in and out. Woofer design T