Tri-chamber speaker box

• US 5,647,012 A
• Filed: 06/10/1996
• Issued: 07/08/1997
• Est. Priority Date: 06/10/1996
• Status: Expired due to Fees

• Current Assignee: Sang W.U. Han
• Original Assignee: Sang W.U. Han
• Inventors: Han, Sang Wu
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): BARNIE, REXFORD N
• Application Number:
  US08/661,019
• Time in Patent Office: 393 Days
• Field of Search: 381/24, 381/89, 381/96, 381/159, 381/165, 381/194, 381/195, 381/197, 381/199, 381/205, 381/188, 181/145, 181/152, 181/156, 181/194, 181/199, 181/151, 181/171, 181/172
• US Class Current: 381/386
• CPC Class Codes: H04R 1/24 Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
• CPC Class Codes: H04R 1/2819 for loudspeaker transducers

Abstract

A speaker box with improved low frequency response. Three chambers of specified proportion are provided which allow vibration of both front-cone and rear-cone sound waves projected from an internally installed low frequency speaker. Housing is provided for one or more higher frequency speakers, further providing rear covers to protect the speakers from low frequency sound wave interference. Ports are also provided for rear-cone sound wave emission.

Claims

1. Improved low-frequency response speaker box having an upper chamber, lower front chamber, and lower rear chamber, specifically comprising:

a. a horizontal upper baffle;

b. a horizontal lower baffle;

c. a vertical rear baffle;

d. the rear edge of said horizontal upper baffle being connected to the upper edge of said vertical rear baffle and the rear edge of said horizontal lower baffle being connected to the lower edge of said vertical rear baffle;

e. a horizontal middle baffle parallel to said horizontal upper baffle and said horizontal lower baffle and extending perpendicularly from the front surface of said vertical rear baffle;

f. a vertical front baffle parallel to said vertical rear baffle, the upper edge of said vertical middle baffle contacting the lower surface of said horizontal middle baffle and the lower edge of said vertical middle baffle contacting the upper surface of said horizontal lower baffle;

g. said vertical front baffle being slightly recessed from the plane formed by the front edges of the horizontal upper baffle, horizontal middle baffle, and horizontal lower baffle;

h. a vertical middle baffle parallel to said vertical front baffle and said vertical rear baffle, the upper edge of said vertical middle baffle contacting the lower surface of said horizontal middle baffle and the lower edge of said vertical middle baffle contacting the upper surface of said horizontal lower baffle;

i. said vertical middle baffle being positioned between said vertical front baffle and said vertical rear baffle such the distance from the rear surface of said vertical front baffle to the front surface of said vertical middle baffle is 2/5 the distance from the rear surface of said vertical front baffle to the front surface of said vertical rear baffle;

j. said vertical middle baffle being positioned between said vertical front baffle and said vertical rear baffle such that the distance from the front surface of said vertical middle baffle to the front surface of said vertical rear baffle is 3/5 the distance from the rear surface of said vertical front baffle to the front surface of said vertical rear baffle;

k. said vertical middle baffle having a centrally positioned hole therethrough for mounting of a low frequency speaker;

l. said vertical front baffle having a centrally positioned hole therethrough with a diameter 3/4 the diameter of the low frequency speaker installed in said vertical middle baffle;

m. said horizontal middle baffle having a rectangular hole therethrough;

n. said rectangular hole being positioned such that the distance from the front of said rectangular hole to the front surface of said vertical rear baffle is 1/4 the distance from the front edge of said horizontal middle baffle to the front surface of said vertical rear baffle;

o. said rectangular hole being positioned such that the distance from the rear of said rectangular hole to the front surface of said vertical rear baffle is 1/6 the distance from the front edge of said horizontal middle baffle to the front surface of said vertical rear baffle;

p. an upper vertical front baffle having a centrally positioned opening therethrough for mounting a horn tweeter therein;

q. said upper vertical front baffle having a centrally positioned opening therethrough for mounting a midrange speaker therein;

r. said upper vertical from baffle having centrally positioned openings therethrough for mounting both a tweeter and midrange speaker therein;

s. said upper vertical front baffle having ports on either side of said opening.