Temperature and implementation
Class D amplifiers are highly efficient in terms of power dissipation. If a Class D amplifier were heat-sinked like an equivalent Class AB amplifier, it would remain virtually stone cold. The primary objective is to reduce the heatsink size, making the amplifiers more compact. An idling UcD™ amplifier consumes up to 2% of its rated power—equivalent to 8W for a UcD400 amplifier. Whether this results in a significant temperature rise depends on the size of the heatsink. For further details, please refer to the "Thermal Design" application note.
https://www.hypex.nl/FAQ-Hypex/Temperature-and-implementation/My-Hypex-amplifiers-gets-very-warm-is-this-normal
Amplifiers must always be operated with an appropriate heatsink to prevent overheating. Even the highly efficient UcD700, with 90% efficiency, dissipates up to 70 watts at full power. The simplest solution is to use an all-aluminum enclosure to mount the amplifier. If a steel enclosure is used, a standard aluminum heatsink should be installed inside. Additionally, ensure adequate airflow within the enclosure by incorporating venting holes. For further details, please refer to the "Thermal Design" application note.
https://www.hypex.nl/FAQ-Hypex/Temperature-and-implementation/Do-I-need-to-add-a-heatsink-to-the-Hypex-amplifiers-to-cool-them
Our modules are factory-calibrated to achieve optimal Total Harmonic Distortion (THD) performance rather than to standardize operating current. As a result, operating current may vary within a 20% range. While this may lead to noticeable temperature differences, it is not a cause for concern.
https://www.hypex.nl/FAQ-Hypex/Temperature-and-implementation/I-have-a-stereo-Hypex-amplifier-and-one-of-the-amplifiers-gets-warmer-than-the-other-is-this-normal
An application note is available for customers interested in building high-power touring amplifiers. For personalized guidance, please contact our sales department at sales@hypex.nl
https://www.hypex.nl/FAQ-Hypex/Temperature-and-implementation/How-do-I-properly-cool-a-high-power-touring-amplifier