Hi,
I just bought a used Fosi Audio BT30D (Ebay) for a secondary music system (NOT BT30D Pro - which I own and has been perfect for a couple of years). The used BT30D has a very noticeable hum, heard through the speakers. There is no hum until I play music through it at 1/2 volume or more. When I stop the music, the hum is definitely noticeable, and unacceptable. The louder the volume of music, the worse the hum.
It's odd that the hum disappears after 5 seconds, and the amp gets quiet again.
Any idea what's going on or suggested solutions?
Thanks much!
I just bought a used Fosi Audio BT30D (Ebay) for a secondary music system (NOT BT30D Pro - which I own and has been perfect for a couple of years). The used BT30D has a very noticeable hum, heard through the speakers. There is no hum until I play music through it at 1/2 volume or more. When I stop the music, the hum is definitely noticeable, and unacceptable. The louder the volume of music, the worse the hum.
It's odd that the hum disappears after 5 seconds, and the amp gets quiet again.
Any idea what's going on or suggested solutions?
Thanks much!
