You may notice that Apollo Twin USB and Apollo Solo USB get warm after long periods of use. While this is normal and nothing to be alarmed about, there are a few things to take into consideration when using the unit that will help avoid potential issues.
When installing the unit in any location, be sure that there is adequate ventilation. Improper ventilation will cause overheating and can damage the unit. The unit should sit level on its four rubber feet and be placed far enough away from other objects that the air vents on its chassis are not blocked.
The unit should be situated away from heat sources, or other equipment that produces excessive heat. If you work in a particularly hot or humid environment, consider cooling your workspace to avoid excessive heat buildup from your equipment.