How To Adjust The Microphone Volume On Your Plantronics CS540 Wireless Headset

Let's get your voice volumeadjusted

If you currently use a Plantronics CS540 wireless headset, or plan to in the future, you’ll benefit by knowing how to adjust your headset volume, speaking volume in particular. Why is this an important adjustment to know about?

  • You don’t want echo when having phone conversations, right?
  • You don’t want to sound too loud or too quiet when speaking on the phone.
  • You need the ability to adjust your microphone so that your voice volume can be adjusted as needed so everyone can hear you clearly, easily and consistently.

There are several ways to adjust volume on the Plantronics CS540. You have three ways to adjust your hearing volume and one primary way to adjust your microphone volume (how loud you sound to others).

In this blog I’m going to show you how to make the adjustment on your CS540 charging base for raising or lowering how loud you sound to those you’re talking to. This is a simple blog and an even simpler explanation. It’s supported by a good graphic below and a super short video.


If you have any of these conditions, chances are your microphone needs to be adjusted.

  • Echo when on a phone call
  • Poor sound quality
  • Feedback
  • People saying they can’t hear you and are asking you to repeat what you said.
  • People comment to you that your voice is too loud


If any of these situations come up, don’t think that your headset is broken. Chances are you just need a simple microphone adjustment. Here’s how you do it.

  1. Turn the Plantronics CS540 charging base (docking station) upside down
  2. Locate the microphone icon near the red dial (shown below)
  3. Turn clockwise to raise the volume (numbers get higher as you go up in volume)
  4. Turn counter-clockwise to lower the volume (numbers get lower)

Call someone using your headset to see how it sounds and make further adjustments if needed. NOTE: Don’t call someone sitting close to you as that can give you false results.   The factory default setting for the microphone is number 2. You might need more volume but this is a good starting point. Check out the image below for a visual example.

Bottom view of Plantronics CS540 charging base

If you prefer to see a brief video that shows you where the red mic volume dial is located, click below to check it out.

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