Volume is Too Low or High While Using Bluetooth® Audio
The information in this article can help when you are using a Bluetooth® audio device (headphones, earbuds, speakers, etc.) with your your Nintendo Switch console, but the audio is too quiet or too loud.
What to do
Adjust the volume on your Nintendo Switch console using the Volume buttons.
Many Bluetooth audio devices include their own volume controls which determine the audio output volume. Refer to the audio device’s instruction manual or manufacturer’s support to adjust the volume controls on the device.
Enable or disable the Lower Maximum Headphone Volume under System in System Settings to either decrease or increase the possible volume output.
Situation not resolved
Bluetooth audio devices can vary in audio quality and possible volume. Try adding a different Bluetooth audio device or using a wired audio device.