Stereophonic system with discrete bass channels

A subwoofer for a stereo system, comprising:

• an inner housing comprising a closed bottom wall, closed side walls and a top wall including a speaker opening, together forming a first chamber;
• a large outer housing comprising a closed top wall, closed side walls, and an open lower end, said outer housing being inverted over the inner housing;
• connector means between the inner and outer housing supporting them in a spaced relationship, so that a cup-shaped second chamber is defined between the two housings, above the top wall of the inner housing and around the side walls of the inner housing;
• said inner housing having a lower end which serves as a floor contacting base and a vertical side wall surface;
• said outer housing having a 360.degree. extending lower edge which is spaced vertically above the level of said base and horizontally outwardly from the vertical side wall surface of the inner housing, so that a downwardly directed, 360.degree. extending outlet for the subwoofer, is formed near the base of the subwoofer, leading out from the second chamber downwardly towards the floor;
• an upwardly directed vibrating cone type low frequency speaker located within said inner housing, said speaker having a peripheral mounting portion bordering said speaker opening;
• said closed top wall of the outer housing presenting a generally flat surface facing towards the speaker which rebounds the energy emitted from the speaker back to such speaker;
• and
• means connecting said peripheral mounting portion to the inner housing.

A subwoofer for a stereo system, comprising:

• an inner housing comprising a closed bottom wall, closed side walls and a top wall including a speaker opening, together forming a first chamber;
• a large outer housing comprising a closed top wall, closed side walls, and an open lower end, said outer housing being inverted over the inner housing;
• connector means between the inner and outer housing supporting them in a spaced relationship, so that a second chamber is defined between the two housing, above and around the inner housing;
• said connector means comprising a plurality of vertically elongated connector members spaced about the subwoofer, and each including an inner portion in contact with a side wall portion of the outer housing, an upper end portion which projects upwardly above the top wall of the inner housing and makes contact with the top wall of the outer housing, and lower end which terminates above the lower edge of the outer housing;
• said inner housing having a lower end which serves as a floor contacting base;
• said outer housing having 360.degree. extending lower edge which is spaced above the level of said base, so that a generally downwardly directed, 360.degree. extending outlet for the subwoofer, is formed near the base of the subwoofer, leading out from the second chamber;
• an upwardly directed vibrating cone type low frequency speaker located within said inner housing, said speaker having a peripheral mounting portion bordering said speaker opening;
• and
• means connecting said peripheral mounting portion to the inner housing.

A subwoofer for a stereo system, comprising:

• an inner housing comprising a closed bottom wall, closed side walls and a top wall including a speaker opening, together forming a first chamber;
• a larger outer housing comprising a closed top wall, closed side walls, and an open lower end, said outer housing being inverted over the inner housing;
• connector means between the inner and outer housing supporting them in a spaced relationship, so that a second chamber is defined between the two housing, above and around the inner housing;
• said inner housing having a lower end which serves as a floor contacting base;
• said outer housing having a 360.degree. extending lower edge which is spaced above the level of said base, so that a generally downwardly directed, 360.degree. extending outlet for the subwoofer, is formed near the base of the subwoofer, leading out from the second chamber;
• an upwardly directed vibrating cone type low frequency speaker having a peripheral mounting portion bordering said speaker opening;
• means connecting said peripheral mounting portion to the inner housing;
• and
• said first and second chambers being substantially balanced accoustically.

A subwoofer, for a stereo system, comprising:

• an inner housing comprising a closed bottom wall, closed side walls and a top wall including a speaker opening, together forming a first chamber;
• a large outer housing comprising a closed top wall, closed side walls, and an open lower end, said outer housing being inverted over the inner housing;
• connector means between the inner and outer housing supporting them in a spaced relationship, so that a second chamber is defined between the two housing, above and around the inner housing;
• said inner housing having a lower end which serves as a floor contacting base;
• said outer housing having a 360.degree. extending lower edge which is spaced above the level of said base, so that a generally downwardly directed, 360.degree. extending outlet for the subwoofer, is formed near the base of the subwoofer, leading out from the second chamber;
• an upwardly directed vibrating cone type low frequency speaker located within said inner housing, said speaker having a peripheral mounting portion bordering said speaker opening;
• means connecting said peripheral mounting portion to the inner housing;
• and
• a sound absorbing material within both said chambers.

A subwoofer for a stereo system comprising:

• an inner housing comprising a closed bottom wall, closed side walls and a top wall including a speaker opening, together forming a first chamber;
• a larger outer housing comprising a closed top wall, closed side walls, and an open lower end, said outer housing being inverted over the inner housing;
• connector means between the inner and the outer housing supporting them in a spaced relationship, so that a second chamber is defined between the two housing, above and around the inner housing;
• said inner housing having a lower end which serves as a floor contacting base;
• said outer housing having a 360.degree. extending lower edge which is spaced above the level of said base, so that a generally downwardly directed, 360.degree. extending outlet for the subwoofer, is formed near the base of the subwoofer, leading out from the second chamber;
• an upwardly directed vibrating cone type low frequency speaker located within said inner housing, said speaker having a peripheral mounting portion bordering said speaker opening;
• means connecting said peripheral mounting portion to the inner housing;
• wherein said connector means comprises a plurality of vertically elongated connector members spaced about the subwoofer, each including an inner portion in contact with a side wall of the inner housing, an outer portion in contact with a side wall portion of the outer housing, an upper end portion which projects upwardly above the top wall of the inner housing and makes contact with the top wall of the outer housing, and a lower end which terminates above the level of the lower edge of the outer housing;
• and
• wherein the first and second chambers are substantially balanced accoustically.

A stereo system comprising:

• a full spectrum right channel main speaker unit;
• a full spectrum left channel main speaker unit;
• a right channel subwoofer within a first cabinet;
• a left channel subwoofer within a second cabinet that is spaced from said first cabinet, so that the two subwoofers are accoustically separated;
• means providing audio sound information;
• means for dividing said audio sound information into full spectrum right and left stereo channels and directing said channels to the right and left main speaker units, respectively;
• means for selecting a low frequency portion of the audio sound information that is delivered to the right channel subwoofer, so that such low frequency audio sound information will be played both by the subwoofer and by the left channel main speaker unit, and the remaining left channel audio sound information will be played by the left channel main speaker unit but not by the right channel subwoofer.

A stereophonic sound reproducing method, comprising:

• dividing recorded stereophonic audio information into two full spectrum channels;
• amplifying each full spectrum information and directing it to a main speaker means for such channel;
• sand the improvement comprising;
• directing a duplicate low frequency portion only of each channel information to a subwoofer speaker for such channel which is physically spaced apart from the subwoofer for the other channel in a separate cabinet, and which is accoustically isolated from the subwoofer for the other channel, and with said subwoofers being spaced generally across a listening space from the two main channel speakers.