problem with my monitors (please help)
recently i have been having some weird issues with my monitors and i was hoping some of you could help me out?
the first thing i notice is when i first turn them on the initial "pop" of them turning on is now a much higher tone. but the main problem is they have an intermittent crackling going on while they are on. the same issue is happening in both speakers, but it is not mono, and im pretty sure it started around the same time on both sides.
the problem is only sometimes there and its not a huge problem, but obviously i want to get it sorted.
it sounds to me like it might be an issue with the circuit they are sharing with other devices, but i have never heard this problem before and i dont know where to start diagnosing it. i will at some point start unplugging things around the house that share that circuit, but for now im looking for ideas.
the speakers are maybe about 5 years old, so not too old, and i have always turned things on and off in the correct order and with all volumes and gains at zero from day one (although they sometimes get used as general speakers by my family and although i have lectured them about it i cant guarantee they have done the same).
below is a recording of the sound they make. i have only put a HP @ 300Hz to get more headroom so the recording is noisy, but you can clearly hear the intermittent crackling.
its also worth noting that it is not usually as frequent as the recording, but it was particularly bad so i took the opportunity to record it.
any ideas would be hugely welcomed.