Allowing the components to perform as intended by setting them up properly is key! I
Also, any non-super-high-end gear can probably benefit from simple upgrades of jacks and wire... consider there's basically the equivalent of a cable inside your components and speakers. Spending big $ on external cable while ignoring the connectors and wire typical in most components and speakers is a mistake. Using extremely high end parts in the signal path from power outlets to speaker drivers can yield amazing improvements.
