GT ELECTRONICS

[ Microphones; ] amplifiers, preamplifiers [, electronic sound compressors, audio signal processors, speakers, electrical power supplies, and electrical cables and electrical connectors; electronic equipment or components for audio signal instrumentation measuring or testing, namely, microphones, amplifiers, preamplifiers, electronic sound compressors, audio signal processors, speakers, electrical power supplies, electrical cables and electrical connectors; excluding telephones and industrial telephone communications systems ]