I've recently noted some quite severe crackling from two of the amps (a Marshall valve amp and a Session blues baby transistor amp)I have in my music room (upstairs, front of building). Had it been one of the amps only then probably diagnosed an amp fault. I tried the same amps in my dining room at the back of the building and they are perfectly clear. Initial thoughts were the hive smart system (for controlling my heating, hot water and lighting at home) or Virgin broadband which were both recently installed but isolating both did not improve the situation and severe crackling still prevails in both upstairs music room and downstairs lounge - which are both at the front of the house.
Has anyone any thoughts on the potential cause(s) of this anomaly?
Tony