What range of frequencies does the speech amplifier of an amateur radio transceiver typically process?

For voice communications, it is only necessary to transmit the specific frequencies required to make human speech understandable. The standard range for intelligible speech is between 300 Hz and 3 000 Hz. Amateur radio transceivers are designed to restrict the speech amplifier's bandwidth to exactly this range. Processing frequencies lower than 300 Hz or higher than 3 000 Hz would unnecessarily widen the transmitted signal, wasting RF power and taking up valuable space on the radio band. While high-fidelity audio equipment might process a much wider range (like 20 Hz to 20 000 Hz) to make music sound rich, communications gear prioritizes spectral efficiency and intelligibility over audio fidelity.