Your EC amp is on the warm side.
From what I've read,your Adcom should sound fairly neutral.
You dont say what silver interconnects you are using.That can make or break your sound.
A good silver should not sound bright.I have heard bright silver interconnects.
If you want to keep a warmish sound,you may need better silver or go with a good copper.
For silver you may want to look at RS Audio Cables 'Illume' silver.It can be terminated with XLR's but then you will miss out on the Eichmann silver plugs (RCA's) This cable is very detailed with real fine focus and deep,tight bass but yet is not bright.
Another good silver cable is Homegrown Audio Silver Lace.IMO a step down from the Illume.
For copper if you want to go dark/warmer try MIT T-2 more neutral,T-3 warmer.
Kimber Hero is another copper to consider also.