Self-draining loudspeaker system
A loudspeaker system comprises a driver mounted within the interior of a single-reflex band-pass box or a ported box which employ one or more drain tubes to remove standing water that may pool therein without affecting the acoustic performance of the system.
1. A loudspeaker system, comprising:
A ported box comprising a top wall, a bottom wall, a front wall, a back wall and opposed side walls interconnected to collectively form a box interior which defines a ported volume, said bottom wall being formed with a bottom wall opening;
a port located within said enclosure interior, said port having a port diameter and a port length, said ported volume, said port diameter and said port length collectively being tuned to a first resonant frequency;
a driver mounted within said enclosure interior in a position to direct acoustic output from a front side thereof toward said front wall and to direct acoustic output from a back side thereof through said port and toward said front wall;
at least one drain tube connected to said bottom wall opening in communication with said box interior, said at least one drain tube having a tube diameter and a tube length collectively tuned to a second resonant frequency which is less than said first resonant frequency, said at least one drain tube being effective to drain water which enters said box interior through said port.
2. The loudspeaker system of claim 1 in which said at least one drain tube has a first end connected to said bottom wall opening and a second end extending outwardly from said ported box and spaced from said bottom wall.
3. The loudspeaker system of claim 2 in which said bottom wall is oriented at an angle relative to said top wall so that water entering said box interior flows in a direction toward said at least one drain tube.
4. The loudspeaker system of claim 1 further including a shelf located within said box interior, a compartment being formed between said shelf and said bottom wall, said shelf being formed with a shelf opening communicating with said ported volume.
5. The loudspeaker system of claim 4 in which said at least one drain tube is located within said compartment, said at least one drain tube having a first end connected to said shelf opening and a second end connected to said bottom wall opening.
6. The loudspeaker system of claim 5 in which said at least one drain tube is arranged in a spiral within said compartment.