Includes
Audio Amplifiers, Complementary Amplifiers, Amplifiers, Operational Amplifiers, Power Amplifiers, Radio Frequency Amplifiers, Signal Amplifiers, and Video Amplifiers.

Excludes
Multi-functional items such as Amplifier-Detector, Amplifier-Mixer and microcircuit devices.

Possible NAICS Codes
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing
334220 – Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
334290 – Other Communications Equipment Manufacturing
334419 – Other Electronic Component Manufacturing
444180 – Other Building Material Dealers
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing
334519 – Other Measuring and Controlling Device Manufacturing
334412 – Bare Printed Circuit Board Manufacturing
541519 – Other Computer Related Services