In any audio system whether for live sound, studio recording, or wireless audio setups, one critical concept that is often misunderstood or overlooked is Gain Staging. This is not simply about “turning up the Gain knob,” but rather a systematic process of setting signal levels correctly to ensure clean audio, prevent distortion, reduce noise, and maintain optimal sound quality throughout every stage of the signal chain. This article provides a detailed explanation of what Gain Staging is, why it matters, and how to set proper gain levels for audio systems, especially wireless microphone systems such as Sennheiser EW-D, EW-DX, EW-DP, and Digital 6000. Each section is carefully explained to help readers understand the underlying principles, the reasoning behind proper practice, and how to apply Gain Staging accurately to their own systems.