Band_expander
An FM band expander (band converter, FM converter) is a device used on Japanese car stereo systems to enable them to receive international FM frequencies, when used or grey import Japanese cars are shipped to other markets. Japanese radio bands are between 76 and 90 MHz whereas the international broadcast plan is between 87.5 and 108 MHz.[1][2] The unit itself is connected inline between the radio and the antenna, and it downshifts the frequency of the broadcast by a predetermined amount (generally between 10 and 14 MHz).
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