Ear pads with earphones
Efficient parallel-stage power amplifier
Electric charge holding device
Electrical digital fade in and fade out circuit
Electrically controlled attenuator
Electronic circuit with an absorptive distributed limiting...
Electronic control switch for a power boost amplifier
Electronic devices for the automatic control of gain and...
Electronic gain-control arrangement
Electronic gain-control arrangement
Electronic volume device
Enhancing bass
Equalizer circuit, high fidelity regenerative amplifier...
Equalizer networks and methods of developing scaling...
Expander circuit
Expander circuit