Set default sound device output [duplicate]

I own a pair of usb powered speakers, and I am having trouble finding how to set the usb speakers as the default output. I found the setting where you can switch the outputs but no where to asssign a default. I took screenshot here:

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Solution 1:

You can first view your current default audio device by typing:

pactl stat

And with

pactl list

you can view all your devices.

And with this command

echo "set-default-sink alsa_output.Headset" | pacmd

you can set the default device.