At last I realise where I've been going wrong these past years in striving to achieve "that sound".
The secret lies in using the correct power lead for your amplifier (and of course your echo unit).
What you need is the 2 metre Nordost Valhalla power lead and it is available for the 'knock down' price of £2204.95. You may consider that this is rather expensive but do bear in mind that they are individually handbuilt.
http://www.highendcable.co.uk/Nordost%2 ... 0Power.htm
It's early enough for you to get this down on your Christmas list !!