OneSDR contains affiliate links and is a member of the Amazon Services LLC Associates Program, eBay affiliate program, Etsy Affiliate Program. If you make a purchase using one of these links, we may receive compensation at no extra cost to you. This helps support our research, testing and writing.

Logitech G435 Keeps Turning On Sidetone – Troubleshooting Guide

🎧 The Logitech G435 LIGHTSPEED is a lightweight, wireless gaming headset known for comfort and long battery life. However, some users find that sidetone – the feature that feeds your microphone input back into your headphones – keeps turning on unexpectedly. If you prefer it off, this can be frustrating.

Logitech G435 LIGHTSPEED and Bluetooth Wireless Gaming Headset - Lightweight over-ear headphones, built-in mics, 18h battery, compatible with Dolby Atmos, PC, Mobile - Black

Below are the most common causes and how to fix them.

🔍 Understand How Sidetone Works on the G435

Sidetone is controlled directly by the headset’s firmware, not Logitech G HUB. On the G435:

  • Short-press Mute + Volume Up → Increases sidetone level
  • Short-press Mute + Volume Down → Decreases sidetone level (hold until off)
    If sidetone keeps coming back, it’s usually triggered by button combos, resets, or Bluetooth pairing events.

👆 Check for Accidental Button Presses

The sidetone shortcuts are easy to press accidentally, especially when adjusting volume or muting quickly.
Fix:

  • Be mindful of pressing Mute (left earcup) at the same time as volume controls.
  • If possible, adjust volume from your device instead of the headset during gaming.

🔁 Reset the Headset to Factory Defaults

Corrupt firmware settings can cause sidetone to re-enable after every power cycle.
How to Reset G435:

  1. Turn off the headset.
  2. Hold Mute + Power for ~15 seconds until the LED flashes rapidly.
  3. Re-pair the headset.

⚙️ Update Firmware

Older firmware versions sometimes have sidetone bugs.
Steps:

  • Connect your G435 via USB to your PC.
  • Open Logitech G HUB.
  • If prompted, update to the latest firmware.

📱 Check Bluetooth Device Settings

Some devices (especially mobile phones) re-enable sidetone or “mic monitoring” after pairing.
Fix:

  • Remove the headset from your Bluetooth device list.
  • Re-pair it fresh.
  • After pairing, turn sidetone off manually and test if it stays off after reconnecting.

⛔ Disable Auto-Mute Behavior

If you have auto-mute enabled when lifting the boom arm (if applicable), it can toggle sidetone on reconnect.

  • In G HUB, check if Auto-Mute is available and disable it.

☎️ Contact Logitech Support if Persistent

If none of the above works, sidetone may be locked on due to a firmware bug or hardware fault.

  • Visit Logitech Support
  • Provide your firmware version and describe the problem.

✅ Key Takeaways

  • Sidetone can be toggled off by Mute + Volume Down until silent.
  • Avoid pressing sidetone shortcuts accidentally.
  • Firmware updates and factory resets often solve persistent sidetone issues.