Power cord into power amp

I have a full Isoclean system and I was running the Supreme Focus through the Transformers and the 80A filter.

After reading one of the threads here I saw that it is best not to run a power cord into a filter and then into a power amp. Thinking that the Isoclean gear was above that because of the satisfaction I was hearing out of my system I decided to rip into this thinking. But before I wrote anything I pulled the PC out of the filter and into the dedicated wall circuit. Was I ever glad I didn't write up on my bashing thoughts I had about running the PC through a filter.

So what did I hear. Dynamics came alive with a wider soundstage and DEEPER bass. I can turn up the volume higher without the music breaking down. Almost a night and day difference.

Can anyone explain why this has happened?

Thanks to all who contribute their audio info here on the 'Gon.