Speaker with frequency directed dual drivers

Stereo speaker system having acoustic filter for improving...

Stream segregation for stereo signals

Stream segregation for stereo signals

Switched capacitor filter with a neutral bypass setting

System and method for achieving extended low-frequency...

System and method for adjusting frequency response...

System and method for adjusting the low-frequency response...

System and method for distributed gain control

System and method for varying low audio frequencies...

System for audio signal processing

System for automatic compensation of low frequency audio...

System for improving a spatial effect of stereo sound or...

System for maximum efficient transfer of modulated energy

Time zone equalizer

Tone adjusting apparatus for audio signals

Tone control apparatus for front and rear channels

Tone control circuit

Tone control device and sound volume/tone control device for red

Tone control system for sampled data signals