TRU-SONIC

SOUND REPRODUCERS; ENCLOSURES [AND CABINETS] FOR [SUCH REPRODUCERS;] SOUND REPRODUCER SYSTEMS; SOUND CHANNELS; ELECTRICAL CROSSOVER NETWORK SYSTEMS; [AUDIO FREQUENCY AMPLIFIER SYSTEMS; MICROPHONES AND PARTS THEREFOR; OSCILLATORS AND DEMODULATORS; MICROPHONE SYSTEMS INCLUDING MICROPHONES, OSCILLATORS, AND DEMODULATORS; AND WIRELESS MICROPHONE SYSTEMS INCLUDING MICROPHONES, FREQUENCY MODULATION TRANSMITTING UNITS, AND FREQUENCY MODULATION RECEIVING UNITS]