Loudspeaker enclosures for mounting in an aperture in a cavity wall

1. A loudspeaker enclosure for mounting in an aperture in a cavity wall having a wall cavity, with a part of the enclosure being located within the wall cavity adjacent the aperture, wherein the enclosure has an effective internal volume, and the enclosure comprises:

a main enclosure unit for mounting in said aperture and adapted to house one or more loudspeaker drive units, and

a supplementary enclosure unit for location within said wall cavity and being acoustically connected in use to said main unit to increase the effective internal volume of said enclosure beyond that of said main unit, and wherein:

said supplementary unit is connected to said main unit by an articulated connection enabling said main unit to be angled relative to said supplementary unit while said supplementary unit is being inserted through said aperture and into said wall cavity, and enabling said main unit to be aligned with and acoustically coupled to said supplementary unit when said main unit is positioned in said wall aperture.

2. An enclosure as claimed in claim 1 , wherein securing means are provided to fix said supplementary unit in position relative to said main unit when the two units are installed and aligned.

3. An enclosure as claimed in claim 2 , wherein the securing means are selected from a group consisting of screw-threaded securing means, two or more threaded studs projecting from said supplementary unit and associated nuts to secure the ends of said studs within said main unit, and two or more threaded studs projecting from said supplementary unit and associated wing nuts to secure the ends of said studs within said main unit.

4. An enclosure as claimed in claim 1 , wherein said articulated connection is selected from a group consisting of a hinge and a living hinge.

5. An enclosure as claimed in claim 4 , wherein said hinge is a living hinge comprising a first hinge wing attached, in use, to the main unit, a second hinge wing attached, in use, to the supplementary unit, and a web of material connecting the first and second hinge wings.

6. An enclosure as claimed in claim 1 , wherein an acoustic sealing gasket is provided between adjacent ends of said main and supplementary units.

7. An enclosure as claimed in claim 1 , wherein said supplementary enclosure unit is sub-divided into a plurality of sub-parts, an articulated connection being provided between adjacent sub-parts, and the articulated connection of said sub-parts enabling said sub-parts to be angled relative to each other while said supplementary unit is being inserted through said aperture and into said wall cavity, and enabling said sub-parts to be aligned with and acoustically coupled to each other when said supplementary unit is positioned in the wall cavity.

8. A loudspeaker enclosure for mounting in an aperture in a cavity wall having a wall cavity, with a part of the enclosure being located within the wall cavity adjacent the aperture, wherein the enclosure has an effective internal volume, and the enclosure comprises:

a main enclosure unit for mounting in said aperture and housing one or more loudspeaker drive units, and

a supplementary enclosure unit for location within the wall cavity and being acoustically connected in use to the main unit to increase the effective internal volume of the enclosure beyond that of the main unit, and wherein:

a hinge connection connecting the supplementary unit to the main unit and operative to enable the main unit to be angled relative to the supplementary unit while the supplementary unit is being inserted through said aperture and into said wall cavity, and operative to enable said main unit to be aligned with and acoustically coupled to said supplementary unit when said main unit is positioned in said wall aperture, and wherein

said supplementary unit is shallower than said main unit, and said articulated connection is located at the front of said supplementary unit but is spaced from the front of said main unit by a spacing such as to cause the backs of the units to be in alignment in use, the terms “front” and “back” referring to the installed orientation of the units.

9. An enclosure as claimed in claim 8 , wherein said supplementary unit has a depth substantially half that of said main unit.

10. An enclosure as claimed in claim 8 , wherein said main unit comprises a crate-like body portion of moulded plastics material, and a baffle plate mounting said one or more loudspeaker drive units and being releasably mounted on a mouth of said crate-like body portion.

11. An enclosure as claimed in claim 10 , wherein push and turn quick-release fastenings are provided to secure said baffle plate to said crate-like body portion.

12. An enclosure as claimed in claim 8 , wherein respective oblong boxes arranged lengthwise in use with respect to each other constitute said main and supplementary units.

13. An enclosure as claimed in claim 8 , wherein the back, in the in use orientation, of said supplementary unit has a bevel running from the end of said supplementary unit remote from said main unit for part only of said length of the supplementary unit.

14. A loudspeaker enclosure for mounting in an aperture in a cavity wall having a wall cavity, with a part of the enclosure being located within the wall cavity adjacent said aperture, wherein the enclosure has an effective internal volume, and the enclosure comprises:

a main enclosure unit for mounting in said aperture and adapted to house one or more loudspeaker drive units,

a supplementary enclosure unit for location within said wall cavity and adapted to be acoustically connected to said main unit to increase the effective internal volume of said enclosure beyond that of said main unit, and wherein:

an articulated connection connecting said supplementary unit to said main unit and operative to enable said main unit to be angled relative to said supplementary unit while the supplementary unit is being inserted through the aperture and into the wall cavity, and operative to enable said main unit to be aligned with and acoustically coupled to said supplementary unit when said main unit is positioned in said wall aperture, and wherein

one longitudinal end of said supplementary unit and each longitudinal end of said main unit all include respective apertures for acoustic communication with the other unit, and a blanking plate is provided for closing a selected one of said respective apertures of said main unit.

15. An enclosure as claimed in claim 14 , wherein securing means are provided to fix said supplementary unit in position relative to said main unit when the two units are installed and aligned.

16. An enclosure as claimed in claim 15 , wherein said securing means comprises screw-threaded securing means.

17. An enclosure as claimed in claim 14 , wherein an acoustic sealing gasket is provided between adjacent ends of said main and supplementary units.

18. An enclosure as claimed in claim 14 , wherein said supplementary unit is shallower than said main unit, and said articulated connection is located at the front of said supplementary unit but is spaced from the front of said main unit by a spacing such as to cause the backs of the units to be in alignment in use, the terms “front” and “back” referring to the installed orientation of the units.

19. An enclosure as claimed in claim 18 , wherein said supplementary unit has a depth substantially half that of said main unit.

20. An enclosure as claimed in claim 14 , wherein respective oblong boxes arranged lengthwise in use with respect to each other constitute said main and supplementary units.