True or False?

The better the system is the easier it is to make it sound worse. When you are at the top of the mountain the only way forward is down.
Tweaks are for idol worshipers. If it works, it is not a tweak but rather an essential accessory. 

@artemus_5, Superchargers work, cable elevators do not. You are more than welcome to do anything you want to your system. My problem comes when you try to sell that BS to someone else. 
I tweak my system by modifying it's frequency response and adjusting speaker location with impulse testing. I do not do it with silly cables or overpriced tinker toy garbage. I suggest if you really want to tweak your system get one of these https://www.parts-express.com/Dayton-Audio-OmniMic-V2-Acoustic-Measurement-System-390-792