CAAT

amplifiers; equalizers; controllers; microphones; sound analyzers; speakers; circuit boards and interface units for connecting amplifiers; audio filters, audio pre-amps, audio switches; audio test equipment; namely, voltage meters, loads, and inter-modulation distortion analyzers; add-on circuits used with power amplifiers for signal compensation; monitors of an amplifier's input and output wave forms; overload and overheating indicators sold as an integral component of a sound amplifier; AC power supplies, gradient power supplies, and bi-polar power supplies; computer software for use in acoustical analysis; computer software used for audio/video distribution control; and computer software used to control electrical apparatus