Plantronics CS540 Microphone Adjustment The Plantronics CS540 provides a wide range of microphone volume to optimize the loudness of your voice to your caller. There are two important factors that control your headset microphone volume; microphone positioning of the headset, and microphone amplification from the base. First, position the CS540 headset microphone approximately 1/4 of an inch away from the side of your … Continued
