Macspur said:
No problem Cno, value your opinions.
Yes they are made of metal and the speakers have bluetack between them and the top plate.
I've seen power chords by Kimber and WireWorld at a good price... any good?
Mac
Re Power cords.....I'm not sure on this one. Can you get one of each, provided you can return them (if you have to choose, I'd go Kimber).
Re Stands
If there is something going on here, it will be skewing all the tests you are doing.
There are no hard and fast rules, and experimentation is the key. Are you sure the legs of the metal stand aren't hollow, because if they are solid, I've never seen this before.
When you have a suspended wooden floor, the last thing you want is the vibrations being transmitted into it. The Blu-tac on top will certainly help, but the ideal is to dissipate unwanted vibrations into the stand itself, and then isolate the stand from the floor.
The spikes on the bottom of the stand actually act as a coupling device, rather than a de-coupling one.....which means that a simple granite worktop saver for about £10 each, can help if placed under each stand (use the spikes/spike shoes).
I would double check if the legs are actually solid. If they are not, 1/2 to 3/4 filling them with kiln dry sand or kitty litter acts as an acoustic sink, and stops the ringing of a hollow metal tube effecting the sound. It also adds mass to the stands, which can help as well.
Quite a lot of Harbeth owners use solid wooden stands to avoid some of these problems.....do you have a couple off solidly made stools or small side-tables that you could try this. Though it's worth noting that Blu-tac on wood may not be a good idea, as solid wooden or carbon discs are better.
As you can see it's a bit of a minefield, but getting this side of things right can have more effect than any other tweak you can make.