In a passive loudspeaker system the low-level audio signal is first amplified by an external power amplifier before being sent to the loudspeaker where the signal is split by a passive crossover into the appropriate frequency ranges before being sent to the individual drivers.
A landform is a natural feature of the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography.
coastal landform. (geography). The characteristic features and patterns of land in a coastal zone subject to marine and subaerial processes of erosion and deposition. 1  Facebook. 2  Twitter.