BASSBOSS loudspeakers contain both active and passive cooling mechanisms. In most cases, the combination of the fans and heatsink works to pull heat from inside the box (generated by the amplifier and driver) to of the box. However in direct sunlight at high temperatures, the heatsink actually works against against the box, causing heat to enter (it essentially becomes endothermic, not exothermic). In these cases, the speaker will run at a lower volume to protect the inside from melting or being damaged until the temperature inside the box drops to a more manageable level. You will see this occurring if the TEMP light on the back of your speaker lights up.
If you are having issues with boxes overheating, adding shade over the box will keep it from drawing in heat from the sun. Giving it some time turned off or down will also help keep the temperature down. If you must operate the speaker in direct sunlight, there are a few things you can do to keep it from overheating:
- Use a fan on the heatsink: A fan blowing across across the heatsink (which is the black metal part the inputs and power are connected to) will help dissipate more heat from inside the box. A Lasko Blower such as this will do the job.
- Use an ice pack (or ice wrapped in cloth): Gather some ice cubes or an ice pack, wrap them in a cloth, and press this against the heat sink to pull heat out from inside the box. Be careful not to let too much water get near the power or signal connectors (MK3 BASSBOSS Loudspeakers are IP rated). Melting means it is cooling the box.