Dollar to Satisfaction Ratio not met.

Comments and assistance needed. I have a Bat VK51SE paired with a McCormack DNA 500.

CDP--Cambridge Audio 840c,

Interconnects--Supra- EFF ILS XLRs, & Kimber Hero via BAT adapters

Speakers-- VMPS 626Rs, ADS 1090s, Platinum Audio Solo

Subwoofer-- Velodyne & Sunfire

Power Cords, DCCA Eminence, Supra LaRod, & Shunyata Taipan helixs

My situation is this, sound with the BAT and McCormack is quite dull, I have muffled highs and mids, and just bass sound no articulation, regardless of what other equipmentinterconnects use to connect these two with. But when I switch out the Bat with my Nuforce P9 pre, it's a remarkable transformation, same when switching out the DNA-500 with my DNA-225, another remarkable transformation. So, any ideas, expertise, or suggestions, in the VK51SE & DNA-500 pairing would be quite helpful. I would like to keep the 500 and 51SE together for my 2 channel listening, please advsie. Thanks !!!!