VODOO TWEAKING
I believe if someone just thinks he/she hears an improvement or actually in fact does hear an improvement in the sound of their system by whatever means is irrelevant. The name of the game is to enjoy the musical experience. If sitting in the Lotus position with the gear under a pyramid enhances the experience for someone, then who am I to say why it sounds better to them.
Some of the tweaks do sound a little far fetched, but not long ago I thought firmly that cables didn't make a difference as long as the wire is of sufficient diameter, and made of a decent metal.
I was totally wrong.
When I changed from rat shack mega cable to Cardas, the difference was apparent to all who listened to the system. It definately was not a figment of my imagination, or a "wish" on my part to justify the added cost.
Anyone who owns tube equipment can hear the difference in using rubber or cone feet under the equipment, or putting tube "dampers" on some tubes. Damping vibration in equipment is a real tweak. Tap a tube during a quiet passage, or no music playing, you'll hear the tap amplified through the system. Vibrations in the room from music playing does the same thing and obscures detail in the soundstage. Called "microphonics.
Don't knock "tweaks" till you try em.