Audio speaker system

• US 6,141,428 A
• Filed: 10/28/1993
• Issued: 10/31/2000
• Est. Priority Date: 10/28/1993
• Status: Expired due to Fees

• Current Assignee: Chris Narus
• Original Assignee: Chris Narus
• Inventors: Narus, Chris
• Primary Examiner(s): LE, HUYEN D
• Application Number:
  US08/162,364
• Time in Patent Office: 2,560 Days
• Field of Search: 381/154, 381/86, 381/90, 381/188, 381/205, 381/24, 381/338, 381/345, 381/349, 381/351, 381/87, 381/89, 381/332, 381/FOR 141, 381/300, 381/335, 181/156, 181/141, 181/153, 181/199, 181/144, 181/145
• US Class Current: 381/338
• CPC Class Codes: H04R 1/2819 for loudspeaker transducers

Abstract

A speaker system having increased sound quality comprising a first and second speakers each having a front and back. The first and second speakers cooperate with a duct having a first elongated portion in fluid communication with the rear of the first speaker and a second elongated portion in fluid communication with the rear of the second speaker. The duct has an elongated bass port defined therein intermediate the first and second portions. Each of the speakers have their fronts in contact with the air outside of the duct and the backs of the speakers are in contact with the air inside the duct. The duct may have a first spur intermediate the first and second speakers with a bass port in the first spur. The duct may have a second and third spur at the axial extremities with the first and second speakers respectively engaging the second and third spurs. Each spur may have an axis and the axes of the spurs may be generally coplanar for automobile use. The bass port may be offset between the second and third spurs. The second and third spurs may be connected to the first and second speakers with flared connections. In some forms of the invention the flared connections bolt to existing speaker hardware. The first spur may have an axial extremity with an oblique face. The duct may be constructed from plastic and may be fiberglass lined. For truck applications, each spur may have an axis and the axis of the first spur may be generally perpendicular to the axes of the second and third spurs.

Claims

1. A speaker system having increased sound quality which comprises:

a first and second speaker, said speakers each having a front and a back;

a duct having a first elongated portion, a second elongated portion and a third elongated portion, said first portion having an axial extremity in fluid communication with said back of said first speaker, said second portion having an axial extremity in fluid communication with said back of said second speaker; and

said third portion being disposed intermediate said first and second portion;

said third portion includes an elongated first sour and a bass port is located at one end thereof, said sour being intermediate said first and second portions;

each of said speakers having the front thereof in contact with air outside of said duct and the back thereof in contact with air inside said duct, said first and second portions respectively include elongated second and third spurs at the axial extremities respectively of said first and second portions.

2. The apparatus as described in claim 1 wherein:

each of said spurs has an axis and said axes of said spurs are generally coplanar.

3. The apparatus as described in claim 2 wherein:

said bass port is closer to said second spur than said third spur.

4. The apparatus as described in claim 3 wherein:

said speakers are truncated conical elements and said second and third spurs have flared connections mating respectively with said first and second speakers.

5. The apparatus as described in claim 4 wherein:

said flared connections flare to a larger cross-section at the front of the speakers to which they are connected.

6. The apparatus as described in claim 1 wherein:

said first spur has an axial extremity having an oblique face.

7. The apparatus as described in claim 1 wherein:

said duct including said first, second and third spurs are constructed of plastic.

8. The apparatus as described in claim 7 wherein:

said duct is fiberglass lined.

9. The apparatus as described in claim 8 wherein:

said duct is generally cylindrical.

10. The apparatus as described in claim 1 wherein:

each of said spurs has an axis and said first spur has an axis that is generally perpendicular to said axes of said second and third spurs.

11. The apparatus as described in claim 10 wherein:

said bass port is closer to said second spur than said third spur.

12. The apparatus as described in claim 11 wherein:

said second and third spurs have flared connections that are respectively connected to said first and second speakers.

13. The apparatus as described in claim 12 wherein:

said flared connections are secured to respective speakers.

14. The apparatus as described in claim 10 wherein:

said first spur has an axial extremity having an oblique face.

15. The apparatus as described in claim 1 wherein:

said duct is constructed of plastic.

16. The apparatus as described in claim 15 wherein:

said duct is fiberglass lined.

17. The apparatus as described in claim 16 wherein:

said duct is generally cylindrical.