In my experience the power conditioners that work correctly and improve the overall sound quality (without lost of dynamic) were the Burmester 948 and the Shunyata Hydra 8.
For the Burmester 948 I used with very great sonic result the power cord Burmester Silver 2.5 and with Hydra 8 the Shunyata Anaconda...In both situations, the sonic result is granted...
For the Burmester 948 I used with very great sonic result the power cord Burmester Silver 2.5 and with Hydra 8 the Shunyata Anaconda...In both situations, the sonic result is granted...