Ceiling-mounted loudspeaker enclosure

1. A loudspeaker assembly, comprising:

(a) a tubular enclosure comprising a first opening substantially parallel to a first plane and communicating through an interior lumen with a second opening substantially parallel to a second plane, said tubular enclosure having a solid gas-impermeable sidewall between said first opening and said second opening; wherein the first plane is inclined with respect to the second plane at an acute angle;

(b) an acoustic driver connected to the first opening for transmitting an acoustic output sound through the tubular enclosure's interior lumen to the second opening;

(c) said tubular enclosure having a speaker module connected to the second opening; wherein the tubular enclosure first opening is a top opening which is substantially parallel to the first plane and said second opening is a bottom opening which is substantially parallel to the second plane; wherein the acoustic driver is secured in the top opening;

(d) wherein the speaker module is secured in the bottom opening of the tubular enclosure, and wherein the area of the first opening exceeds that of the second opening;

(e) wherein the top opening is substantially oval in shape;

(f) wherein the bottom opening is substantially circular in shape;

(g) wherein said acoustic driver connected to said first opening comprises a first low frequency acoustic driver secured in the top opening of the tubular enclosure; and said speaker module secured in the bottom opening of the tubular enclosure has a baffle plate extending across said bottom opening and carrying at least first and second acoustic ports in said baffle plate for transmitting acoustic waves from said first driver out of said enclosure;

(h) wherein said speaker module includes at least a second higher frequency acoustic driver mounted over a corresponding opening in said baffle plate for directing acoustic waves from said second driver downwardly and away from said baffle plate;

(i) wherein said tubular enclosure's interior lumen is in fluid communication with said first and second acoustic ports; and wherein said tubular enclosure's interior lumen, said first port and said second port are dimensioned to provide a tuned port loudspeaker system adapted to project low-pass limited acoustic waves from said first driver, wherein said tuned port loudspeaker system is tuned to provide selected port resonant frequency; and

(j) wherein said second higher frequency acoustic driver is configured to radiate over a natural pass-band frequency range, and said selected port resonant frequency being below the natural pass-band frequency range of said second, higher frequency driver.

2. The loudspeaker assembly of claim 1 , wherein the tubular enclosure is horn shaped and has a bent structure.

3. The loudspeaker assembly of claim 1 , wherein the projection area of the first opening onto the second plane is smaller than the second opening.

4. The loudspeaker assembly of claim 1 , further including:

a fastener for securing the assembly in an aperture in a ceiling structure; and

a trim ring incorporating a flange engaging said speaker module and cooperating with said fastener to mount the assembly in a ceiling.

5. The loudspeaker assembly of claim 4 , wherein the tubular enclosure further comprises a recess for receiving said fastener.

6. The loudspeaker assembly of claim 1 , wherein the tubular enclosure further comprises first and second resin semicylindrical bodies each semicylindrical body defining a solid gas-impermeable sidewall, wherein said first and second semicylindrical bodies are joined to each other to form the tubular enclosure, and to define the first and second openings.

7. The loudspeaker assembly of claim 6 , wherein said first and second semicylindrical resin bodies are injection molded.