Wireless Subwoofers

A wireless subwoofer reproduces low frequencies without an audio cable running to the amplifier or soundbar: the signal reaches it via a radio link, proprietary Wi-Fi or a dedicated transmitter module. Only the power cable remains necessary, allowing great freedom of placement, in a corner, against a wall or behind a piece of furniture, wherever bass performs best. This is its main advantage, as the position of a subwoofer has as much impact as its quality on bass reproduction in a room. The enclosure contains its own amplifier and a large-diameter driver, front- or down-firing, sometimes supported by a port or passive radiator to reach lower frequencies. It relieves the main speakers of the heaviest bass, allowing them to gain midrange clarity, and handles the effects channel of movie soundtracks. The trade-off lies in the nature of the connection, specific to a brand: a wireless subwoofer pairs with a soundbar or amplifier from the same ecosystem, rarely with a device from another brand, and radio transmission adds a slight delay that good systems compensate for. Setup matters, with phase, crossover frequency and level to be matched to the main speakers to avoid bass that lingers or dominates. This subwoofer most often complements a soundbar or a system from the same brand; the full range can be found in subwoofers, and a wired model connects via a subwoofer cable when a radio link is not used.