Oh, one more thing I forgot. Brizonbiovizier, if you are using filters on your speaker cables you are greatly reducing the frequency extension of any cable used and it wouldn't surprise me at all that you hear no differences.
It would be like trying to judge different grain levels of camera lenses after putting a non reflective coating on the lens that hurts the performance of all the lenses but hurts the top performers worse making them close to the same.
It would be like trying to judge different grain levels of camera lenses after putting a non reflective coating on the lens that hurts the performance of all the lenses but hurts the top performers worse making them close to the same.