I'm a Vandersteen dealer and used to sell MIT cables and McCormack amplifiers. The Vandersteens can sound very lively and transparent with the right gear, but MIT cables are the wrong choice, especially partnered with the also darker sounding McCormack amplifier.
You have three things all tilted in the same direction. The 2Ce Sigs are ever so slightly leaning toward the warmish side of neutral, the McCormack even more so, and the MIT cables are the most skewed.
Start by changing to a neutral solid-core conductor cable with no networks or filters of any kind. That will bring some life back into your sound. Then you can consider the amplifier next if needed.
Good luck.
You have three things all tilted in the same direction. The 2Ce Sigs are ever so slightly leaning toward the warmish side of neutral, the McCormack even more so, and the MIT cables are the most skewed.
Start by changing to a neutral solid-core conductor cable with no networks or filters of any kind. That will bring some life back into your sound. Then you can consider the amplifier next if needed.
Good luck.