Pity about the effort

The unit is beautiful and my daughter was very sad when I told her that we can not keep it. After switching hear a hum, even if one adjusts the volume control to minimum, that it comes from the built-in power supply. A noise is also heard on this when max. is rotated, but that would still excusable, something we know from other devices also.
Amazon has but us a replacement unit sent because it is just. We will buy us another device.
Too bad for all the effort to provide such a device 2 x with the shipping company and pick up again determined costs a lot of money. Could be avoided by better quality assurance.