Isotek Mini Sub GII

In order to improve the mains feed and to avoid some interferences from other appliances I've acquired an Isotek Mini Sub GII filter for may system. The results are amazing, from image to sound, I'm noticing a very perceptive improvements, except for the Krell KAV-400xi integrated amplifier.


Having the Krell powered through the Mini Sub the sound gets different, there is a tonal shift in all frequency spectrum, much more silent, better perception of voices which allow to understand the dictation even more. But, compared to the previous situation there is a slight lack of bass weight. Or, this change could be understood as a better controlled bass, compared to the previous somewhat boomy bass notes.


Does anyone experience such changes?