so, i've spent a good few hours listening to music through the Marantz SA14S1SE today, and had a try with the filters , theres only 2, so i've swapped from one to the other, and it seems i prefer filter 2. has anyone else had an experiment with the filters? not sure what i'm hearing different, but just seems i settle for it over filter 1. placebo button? or is it actually doing anything?