Monitor Controller article
Common Monitor Controller Mistakes to Avoid
Most monitor controller mistakes come from incorrect setup habits rather than equipment problems. Here are the errors that consistently cause issues and how to correct each one.
A monitor controller is a relatively simple device, but a small number of mistakes consistently affect setup and use. Most are easy to fix once you know what to look for.
Leaving the Interface Output Below Maximum
Connecting the audio interface to the unit and then leaving the interface’s monitor output at a reduced level is a common error. The correct approach is to set the interface monitor output to maximum and control listening level exclusively from the unit’s volume knob. Turning down the interface before the signal reaches the controller reduces the signal-to-noise ratio and means the controller is operating on an attenuated signal, reducing its effective resolution. Keep the interface at full output; let the controller do all the attenuation.
Not Calibrating Speaker Pair Levels
When switching between two speaker pairs on a monitor controller, if the two pairs play at different volumes, you will instinctively prefer whichever one is louder — because our perception of mix quality is significantly influenced by volume. Use a reference track and the per-output trim controls (available on units like the Audient Nero) to calibrate both pairs to the same perceived level before making any mix comparisons. Only then does switching between them tell you something useful about the mix rather than just confirming that one speaker is louder.
Ignoring Ground Loop Hum
Ground loop hum — a 50Hz or 60Hz buzz in the monitoring signal — sometimes appears when the unit is added to an existing setup. It usually comes from a difference in electrical ground potential between two or more pieces of equipment. Check that all devices in the chain are powered from the same mains socket or power strip, use balanced cables throughout, and verify that the unit itself is earthed. Some include a ground lift switch for this situation.
Not Using the Mono Button
Many users set up the unit and never press the mono button. This is a significant omission. A mono check reveals phase problems, thin-sounding centre elements and bass that disappears when the channels are summed. Make checking in mono a habit during every session, not an occasional afterthought. Press mono, listen for ten to fifteen seconds, note anything that changes significantly, then investigate those elements in the mix before returning to stereo.
Powering Speakers On First and Off Last
Speakers should be the last component powered on and the first powered off. If you power the interface or the unit while the speakers are on, transient spikes from the switching can damage the speaker drivers or tweeters. Establish a consistent on and off routine: interface first, then the unit, then speakers; and reverse that order at shutdown.
Buying More Than You Need
It is tempting to buy the most feature-rich unit available, but a unit with four speaker outputs and three headphone buses adds complexity for a solo producer with one speaker pair and one set of headphones. Buy for your actual setup. A clean, well-built unit that exactly covers your needs outperforms a complex unit with features you never use and potential failure points in paths you never enable.
For a technical overview of these devices, see our monitor controller overview. For buying guidance, read the buyer’s guide and best value recommendations.
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