... Unfortunately, a bad power supply. For me, only the power supply itself will beep and a little out of the speakers is heard no beeping or buzzing during operation. However, it comes when you switch the phono preamplifier, for example if the amplifier o. Receiver still on the channel where the phono preamplifier is connected is, for about 2-3 seconds to beep and then a thump from the speakers. Whether that is also related to the poor power supply I can not say. Have no other power supply for testing. I read on the net that others have these sounds when you turn off! Also you can not turn a finger the phono preamplifier. It usually comes only with 2 fingers. The device is in fact so easily that one the whole device when switching on with a finger with lifts! Because the device is so light it can when a pair of massive RCA cables may happen that the device tilts backwards. Nevertheless, I forgive even 4 star but because it sounds very good for the price.
