BRZHiFi X20 noise 

This is an example video recorded with a microphone without noise cancelling to show the noise of the BRZHifi X20 even at zero input signal and near zero amplification. For nearly 200€ it shows bad design, killing the relatively good SNR of the TPA3255 chip for good. Also the Bluetooth antenna is located near the inputs, and therefore cannot be shielded out to not make noise. When digital inputs are selected, you can also hear the "pumping".