Some basic and obvious things you may or may not have done.
1. Speaker placement: move them around especially distance from the back wall, some positions will increase bass thereby changing the voicing of your system.
2. Room treatment - Lots of hard surfaces, glass, hardwood floors, etc? Try some wall hangings, drapes or dedicated audio absorbent panels.
Although KCAG is a pretty good cable they are what, a 8 year old design. I found wire world gold reference to be less harsh - not really warmer just less emphasis on that upper mid, lower tweet range that emphasizes hard and bright. The WW are not cheap.
I am not personally familiar with the Adcom 750 but I'm guessing it's somewhat outclassed by the rest of your system.
Can you borrow equipment from fellow audiphiles to identify the "culprit"?
1. Speaker placement: move them around especially distance from the back wall, some positions will increase bass thereby changing the voicing of your system.
2. Room treatment - Lots of hard surfaces, glass, hardwood floors, etc? Try some wall hangings, drapes or dedicated audio absorbent panels.
Although KCAG is a pretty good cable they are what, a 8 year old design. I found wire world gold reference to be less harsh - not really warmer just less emphasis on that upper mid, lower tweet range that emphasizes hard and bright. The WW are not cheap.
I am not personally familiar with the Adcom 750 but I'm guessing it's somewhat outclassed by the rest of your system.
Can you borrow equipment from fellow audiphiles to identify the "culprit"?