A loudspeaker comprising: an enclosure defining a central axis; and a bass driver being operable to radiate sound in a forward direction and a rearward direction relative to the enclosure ; wherein the enclosure is configured to receive sound radiated in the rearward direction from the bass driver and defines a coiled non-planar passageway for guiding rearwardly radiated sound; wherein: the coiled non-planar passageway guides sound received by the passageway at a rearward part of the enclosure to a front part of the enclosure , the coiled non-planer passageway being connected to the bass driver by a chamber ; and the loudspeaker further comprises: a central baffle part mounted to a front face of the enclosure , the bass driver being mounted to the central baffle part ; a transmission line outlet for allowing sound that has passed through the coiled non-planar passageway to escape the enclosure , the transmission line outlet comprising an annular opening provided on the front face of the enclosure ; and a driver outlet provided on the front face of the enclosure for transmitting sound radiated from the bass driver in the forward direction to enter a listening area external to the enclosure . an enclosure defining a central axis; and a bass driver being operable to radiate sound in a forward direction and a rearward direction relative to the enclosure ; wherein the enclosure is configured to receive sound radiated in the rearward direction from the bass driver and defines a coiled non-planar passageway for guiding rearwardly radiated sound; wherein: the coiled non-planar passageway guides sound received by the passageway at a rearward part of the enclosure to a front part of the enclosure , the coiled non-planer passageway being connected to the bass driver by a chamber ; and the loudspeaker further comprises: a central baffle part mounted to a front face of the enclosure , the bass driver being mounted to the central baffle part ; a transmission line outlet for allowing sound that has passed through the coiled non-planar passageway to escape the enclosure , the transmission line outlet comprising an annular opening provided on the front face of the enclosure ; and a driver outlet provided on the front face of the enclosure for transmitting sound radiated from the bass driver in the forward direction to enter a listening area external to the enclosure . the coiled non-planar passageway guides sound received by the passageway at a rearward part of the enclosure to a front part of the enclosure , the coiled non-planer passageway being connected to the bass driver by a chamber ; and the loudspeaker further comprises: a central baffle part mounted to a front face of the enclosure , the bass driver being mounted to the central baffle part ; a transmission line outlet for allowing sound that has passed through the coiled non-planar passageway to escape the enclosure , the transmission line outlet comprising an annular opening provided on the front face of the enclosure ; and a driver outlet provided on the front face of the enclosure for transmitting sound radiated from the bass driver in the forward direction to enter a listening area external to the enclosure . a central baffle part mounted to a front face of the enclosure , the bass driver being mounted to the central baffle part ; a transmission line outlet for allowing sound that has passed through the coiled non-planar passageway to escape the enclosure , the transmission line outlet comprising an annular opening provided on the front face of the enclosure ; and a driver outlet provided on the front face of the enclosure for transmitting sound radiated from the bass driver in the forward direction to enter a listening area external to the enclosure . <EOS>