Subwoofer cables serve the same purpose as other audio cables or speaker cables, however they are specifically designed to transmit low frequency audio signals that are produced by a subwoofer. They are typically connected from a receiver or amplifier directly to the subwoofer. It is highly recommended to use subwoofer cables when transmitting to any type of speaker system or home cinema setup. Lengths range from 30 cm to 30 metres, however it is highly recommended to use an extender kit when transmitting signals over long distances, especially for hifi audio.