I liked this sentence from that
“I was pretty much convinced about the main goals I should seek in my system: tone, dynamics and speed. Usual audiophile attributes such as imaging, 3D etc I increasingly started failing to notice on live performances.”
For me, when you don’t have much of the first 3 things, to which I would add delicacy, scale, slam and depth, then all you can focus on is imaging, 3d etc - that and plugging in endless grounding boxes, audiofool fuses and Basilisk thick cables😂
Hoping the tone, dynamics and speed etc feature highly here.
You can tell it was posted over ten years ago - a lot of the replies are friendly 
Yes, I liked that bit too. Hopefully Gordan @anubisgrau sees this and can give some follow up thoughts.
He was talking about horns, not carbon cables!
A few things for consideration:
(1) Are you 100% confident the noise is being emitted by the drivers (a), or is it perhaps the subwoofer enclosures/plate amps physically vibrating (b).
(a) - if yes go-to (2)
(b) - if yes go to ifi DC-blocker - cheap enough to try and see if it helps.
(2) Are you using a mix of balanced/XLR and unbalanced/RCA cables (a), or are they all the same (b)?
(a) If XLRs are an option, use these throughout, they are usually more immune to system noise, if not, use RCAs throughout.
(b) Are any of them so-called pseudo-balanced (screen connected only at one end), or some kind of weird design (box in the middle, Van den Hul carbon-fibre crap, unscreend DNM Reson, etc), if they are, ditch them in favour of something normal!
(3) Lots of valve amps have a ground-lift switch, check and see if the Viva’s have such, try changing the setting (safest to power-down - switch - then power-up again).
(4) Is everything plugged into the same outlet? More than one plug-board can be a bad idea, especially if you’re using the cheap shit that twats on forums insist is all you need. Even different wall sockets can be on different ring-mains, or stupidly-long spurs. It’s better to plug the whole lot into one high-quality plug-board and use long runs of power cable to reach the speakers.
(5) Any wanky mains cables in-use? There’s a cyclical fetish for using US-stuff, or even omitting an Earth connection. Don’t.
(6) Old house? Is all of the wiring to modern standards? Are the outlets you’re using definitely Earthed? Is the Earth of good quality (i.e.more than a strap to a central heating pipe). You can do a basic check yourself with a socket tester that incorporates an Earth impedance checker - something like a Kew Loopcheck107 - you could get a UK model and use it with a good quality converter plug.
(7) Easy common ground - grab an ESD plug -
And a cheap reel of 0.5mm Earth wire, undo a screw on the case of every bit of kit, including the (I assume) plate amps on the speakers, strip 1cm from the end of each wire and twist round the screw, then screw tight enough to hold, same at the other ends, twist 'em onto the binding posts on the plug, again if you got the UK version then you’ll obvs need a decent converter, but presumably all these things have Euro equivalents.
This way you have a common low impedance system ground which has a high impedance to Earth, so no risk of faults taking the wrong path and not tripping protection devices.
OK, I’m out of brane for now. Good luck!
PS: somewhere I have a boxfull of those UK ESD plugs (don’t ask…), if you go that way drop me a line.
Thanks very much for taking the time to reply Paul, I appreciate it 
(1) Are you 100% confident the noise is being emitted by the drivers
- Yes
(2) Are you using a mix of balanced/XLR and unbalanced/RCA cables (a), or are they all the same (b)?
- All RCA cables
(b) Are any of them so-called pseudo-balanced (screen connected only at one end), or some kind of weird design (box in the middle, Van den Hul carbon-fibre crap, unscreend DNM Reson, etc), if they are, ditch them in favour of something normal!
- 1pr ANUK, others I’m not sure, names lost in the mists of time & beer. I’ll get a few sets of regular interconnects & see if that makes a difference
(3) Lots of valve amps have a ground-lift switch, check and see if the Viva’s have such, try changing the setting (safest to power-down - switch - then power-up again).
- The phono pre has a ground lift - it doesn’t seem to change much in terms of hum. Can’t see one on the amp.
(4) Is everything plugged into the same outlet? It’s better to plug the whole lot into one high-quality plug-board and use long runs of power cable to reach the speakers.
(5) Any wanky mains cables in-use? There’s a cyclical fetish for using US-stuff, or even omitting an Earth connection. Don’t.
- I don’t mess about - Wychwood multisocket & all mains cables from a firm called Evolution Audio 
(6) Old house?
- 12 years old so should be to modern standards.
Is the Earth of good quality (i.e.more than a strap to a central heating pipe). You can do a basic check yourself with a socket tester that incorporates an Earth impedance checker
- I got an electrician to check that & it was good
(7) Easy common ground - grab an ESD plug
I’ll try that, thanks.
Are u using a sut?
I’m embarrassed to say that I don’t know - the Viva Fono LT only has an MC input but I’m not sure if there’s a step up in there 
Westminsters
Going by the name do they produce a non stop noise that has no detail or substance?
Well spotted. I think apart from staying with AG and looking for a Duo based design, the Oris Swing are the speakers that have intrigued me for the lounge set up, but need to hear them really to appreciate whether they’re an upgrade or just different in presentation.
see if they are amenable for a visit 
To listen to the Krell lol
take your own amp along for comparison to see if the Krell is right for you
With Krell through them you could probably hear them from Stourport.
I can see you are an expert at this.