Musta been something wrong with the bike, or maybe pods were really small and pointed in differnet direction.
The sound is really low and gruntty, so it acoustics plays a big role in how you hear it. But the way the S2R800 places the TPO pod kit, it is very very loud. Much louder than stock airbox, but not quite as low gruntty. Maybe your hearing is busted and you cant hear the tone the pods make?