System is CD555, full spec LP12 turntable, NAC552, NAP300 all on Fraim, Super Lumina interconnect and speaker cables feeding Focal Diablo Utopia speakers. The 555/552/300 have just been serviced and had the DR upgrades done at Naim. A massive outlay over the years to reach a system that has given me a lot of pleasure......................but not any more. Whilst the black boxes were receiving the upgrades (and went into storage for a while) I moved house. Once I had the keys to the house I had a dedicated mains supply fitted for the system, then installed the system (well, my dealer did really) and now suffer from terrible transformer hum from all 3 power supplies. This can be so bad at times (and my listening position is fairly close to where the system is situated) that I just can't listen to it. Plus I think it's probably also the case that now I know it's there I hear it more. Once most music is playing then the hum can't be heard but when playing quieter jazz or folk pieces and of course just passing the room with the system only in standby it can be heard.
I intend to try these power supplies in different socket outlets at home and then perhaps at different locations to see if the fault lies with the equipment (doubtful, I very rarely heard any hum in my previous house) or it's a mains issue, which I suspect will end up being the cause even with the separate spur.
If anyone has any ideas on other things for me to look at then I'd be grateful. if it turns out to be the mains then what do I do? Try to live with it, even though it's really bugging me at the moment? Look at some mains conditioning? Sell the system and get something without those big toroidal transformers? I'm really quite deflated with it at the moment.
I know Naim equipment can be subject to this noise with less than a perfect mains supply but really when you think about it should £50K's worth of equipment be causing such consternation. Now that I'm suffering from it I'm rather disappointed to say the least.