I have had good luck with Endler and Rothwell Attenuators. Rothwell are fixed and Endler are adjustable like the EVS models linked above. I used both these between my SWL 9.0SE and Jolida CDP, as well as the P.E. attenuators. PE did not sound good, Rothwells there was a very slight difference in sound, and Endlers I didn't notice any change in sound quality.