A quick update (for those that are waiting on me) to say that the new year has been busy enough to prevent me finding time to wander around the house with an oscilloscope to figure out what is going on (it's not something you want to rush either, with mains voltages involved).

My plan, though, is to put either a PS Audio P5 or P12 on the Meridian processor, which comes with a kind of dumbed-down oscilloscope (it won't tell me the frequency bands the noise is in, but it will give me the sine wave and the THD figure), which might give a reasonable idea of where the noise is coming from.

The question now is whether to get a P12, which is meant to be miles better, or a P5, which is miles cheaper (and leaves more budget to change to a DPC-6, if an audition shows that works as well).


Edit: I discovered that having any of the bathroom extractor fans on will also completely destroy the sound stage, despite being on different circuits. In this case, nothing I currently have in place will fix this, but it indicates that it doesn't need to be a PowerLine adaptor to screw things up. Fortunately, we don't have a huge need to run these fans.

Last edited by Jeremy A-H; 2019-01-23 21:50.
Prolific music listener / Hi-Fi addict!