Now the obedience kit itself has many components to tailor the sound from neutral to a warmer sound (like rolling tubes in an amp for example). Many variables come in to play here: what amp is being used, source material, alignment of cans on your head, & most importantly ... how good is the listener's hearing. The kit lets you achieve what Mr. Speakers is doing, or you can make it sound different to suit your needs.
Pretty damn cool tweak to play with for small amount of coin.