Flat baffle speaker system having improved crossover

Claim 3

The method of balancing frequency crossover in accordance with claim 1 wherein step (b) the impedance of the woofer is determined at system crossover frequency.

Claim 4

The method of balancing frequency crossover in accordance with claim 2 wherein step (c) the woofer is provided with circuit inductance in henries approximating 21/2 times the product of effective baffle diameter in feet and woofer impedance in ohms divided by the product of 2π times the speed of sound in feet per second ambient the system.

Claim 5

In an audio speaker system having a middle frequency range driver mounted on a flat baffle of selected effective baffle diameter in feet and a low frequency range driver of selected impedance in ohms coupled by electric circuitry with an audio signal source, the improvement comprising said electric circuitry having inductance in henries of between two and three times the product of said effective baffle diameter and said low frequency range driver impedance times the inverse of 2π s where s is the speed of sound ambient the system in feet per second.

Claim 6

In an audio speaker system having a middle frequency range driver mounted on a flat baffle of selected effective baffle diameter in feet and a low frequency range driver of selected impedance in ohms coupled by electric circuitry with an audio signal source, the improvement comprising said electric circuitry having inductance in henries of between two and three times the product of said effective baffle diameter and said low frequency range driver impedance times the inverse of 2π s where s is the speed of sound ambient the system in feet per second.

Claim 7

In balancing frequency crossover of an audio speaker system having a flat baffle mounted middle frequency range driver and a low frequency driver, the improvement comprising providing the low frequency driver with circuit inductance of a magnitude in henries substantially in accordance with the formula L = kDI where L is the low frequency driver circuit inductance in henries, k is constant within the range of two to three times the inverse of 2π s where s is the speed of sound ambient the speaker system in feet per second, D is effective baffle diameter in feet of the flat baffle upon which the middle frequency range driver is mounted, and I impedance in ohms of the low frequency range driver.

Claim 8

In balancing frequency crossover of an audio speaker system having a flat baffle mounted middle frequency range driver and a low frequency driver, the improvement comprising providing the low frequency driver with circuit inductance of a magnitude in henries substantially in accordance with the formula L = kDI where L is the low frequency driver circuit inductance in henries, k is constant within the range of two to three times the inverse of 2π s where s is the speed of sound ambient the speaker system in feet per second, D is effective baffle diameter in feet of the flat baffle upon which the middle frequency range driver is mounted, and I impedance in ohms of the low frequency range driver.

Claim 9

The improvement in balancing frequency crossover of claim 5 wherein k is substantially 2.56.

Claim 10

In an audio speaker system having at least one squaker mounted on a flat baffle and at least one woofer of selected impedance in ohms and woofer circuit inductance in henries, the improvement comprising said flat baffle having an effective baffle diameter in feet of between 1/2 and 1/3 kL/I where I is the woofer impedance in ohms, L is the woofer circuit inductance in henries and k is 2 π s where s is the speed of sound in the air about the audio speaker system in feet per second.

Claim 11

In an audio speaker system having at least one squaker mounted on a flat baffle and at least one woofer of selected impedance in ohms and woofer circuit inductance in henries, the improvement comprising said flat baffle having an effective baffle diameter in feet of between 1/2 and 1/3 kL/I where I is the woofer impedance in ohms, L is the woofer circuit inductance in henries and k is 2 π s where s is the speed of sound in the air about the audio speaker system in feet per second.

Claim 12

The improvement in audio speaker systems of claim 7 wherein I is the woofer circuit impedance substantially at crossover frequency of the woofer and squaker.

Claim 13

In an audio speaker system, the method of dimensioning a flat baffle adapted to support a squaker for use with a woofer, said method comprising the steps of determining the impedance and inductance of the woofer and providing the flat baffle with an effective baffle diameter of the product of the determined woofer inductance times 2π s where s is the speed of sound ambient the audio speaker system divided by between approximately two and three times the determined woofer impedance.

Claim 14

In an audio speaker system, the method of dimensioning a flat baffle adapted to support a squaker for use with a woofer, said method comprising the steps of determining the impedance and inductance of the woofer and providing the flat baffle with an effective baffle diameter of the product of the determined woofer inductance times 2π s where s is the speed of sound ambient the audio speaker system divided by between approximately two and three times the determined woofer impedance.

Claim 15

The dimensioning method of claim 9 wherein the impedance of the woofer is determined substantially at crossover frequency of the woofer and squaker.

Claim 16

The dimensioning method of claim 9 wherein the flat baffle is provided with an effective baffle diameter of approximately (2πsL)/(2.56I) where I is the impedance of the woofer and L is the inductance of the woofer.