USB control

  lsusb -t

/sys/bus/usb/devices/

In the case of my speakers I'd do the following:
echo suspend | sudo tee /sys/bus/usb/devices/4-1/power/level

TO turn back on:
echo on | sudo tee /sys/bus/usb/devices/4-1/power/level

op de paxoBig;
file:///sys/bus/usb/devices/1-6/product

echo suspend | sudo tee /sys/bus/usb/devices/1-6/power/level
Ongeldig argument

WERKT!
echo '2-1' |sudo tee /sys/bus/usb/drivers/usb/unbind