Shielded electret transducer and method of making the same
Signal derived bias supply for electrostatic loudspeakers
Signal derived bias supply for electrostatic loudspeakers
Single loud speaker drive system
Sound reproduction in portable electronic equipment
Speaker apparatus
Speaker apparatus
Speaker apparatus and sound reproduction system employing same
Speaker device, sound reproducing method, and speaker...
Speaker driving circuit
Speaker driving device
Speaker power matching method and apparatus
Sub woofer system
Switched microphone buffer
System consisting of a microphone and a preamplifier
System for distributing a signal between loudspeaker drivers