ProAudio — Gain Staging Guide

Modified on Fri, 24 Apr at 10:10 PM

Gain staging is the process of setting the correct signal levels at each point in the audio chain — from source input through to speaker output. Getting this right ensures clean, low-noise audio across all zones at a comfortable listening volume.

The ProAudio has three gain controls that work together. Understanding how each one works will help you avoid distortion, excessive noise, or zones that sound very different in volume to each other.

The Three Gain Controls

Input Gain (per source) — found on the Stereo Input tab

Adjusts the level of the incoming audio signal from a specific source before it is distributed to any zone. Range: -24dB to +24dB.

Use this to: Balance the difference in output levels between different source devices so all sources sound roughly equal in volume when selected.

Output Gain (per zone) — found on the Stereo Zones tab

Adjusts the output level for that zone relative to its volume setting. Range: -24dB to +24dB.

Use this to: Match the sensitivity of different amplifiers across zones so all zones reach a similar listening volume at the same volume setting.

Master Volume — found at the top of the Config Tool sidebar

A global level control that affects all zones simultaneously.

Use this to: Set overall system headroom. In most installations, leave at 0dB and use Output Gain to balance individual zones.

Recommended Gain Staging Process

Start with everything at 0dB. Set all Input Gains, Output Gains, and Master Volume to 0dB. Set EQ flat. This gives you a known baseline.

Set minimum and maximum volume limits per zone. On the Stereo Zones tab, open the Levels tab for each zone and set a sensible minimum and maximum volume. This prevents users from setting volume too low or too high.

Balance your sources using Input Gain. Play audio from each source at a typical listening level, routed to a single reference zone. Adjust each source's Input Gain until all sources sound roughly equal in perceived volume when switched between.

Balance your zones using Output Gain. Route the same source to each zone in turn at the same volume setting. Adjust Output Gain for each zone until they all sound roughly equal. This compensates for differences in amplifier sensitivity and speaker efficiency.

Set minimum volume levels. Return to the Levels tab for each zone. Set the Minimum Volume to just above the noise floor of that room — typically between -60dB and -40dB depending on the amplifier and speakers.

Check for distortion. Play audio at near-maximum volume on each zone. If distortion is heard, reduce the Output Gain for that zone or reduce the Input Gain for the source. Do not simply lower the Master Volume to mask the problem.

Common Problems and Causes

Problem	Likely cause and fix
One zone is much louder than others at the same volume setting	Adjust the Output Gain for the louder zone downwards, or raise the Output Gain on quieter zones.
Switching between sources causes a big volume jump	Source devices have different output levels. Adjust Input Gain for the quieter source upwards.
Hissing or noise at low volumes	Minimum Volume is set too low, below the amplifier noise floor. Raise the Minimum Volume setting.
Distortion at high volumes	Output Gain or Input Gain is too high, overdriving the amplifier. Reduce the relevant gain setting.
Volume controls feel unresponsive at low end	Volume range between minimum and maximum is too wide. Raise the Minimum Volume on the Levels tab.