From time to time, it may become necessary to clean the fan filter. It’s a good idea to keep the fan filter clean to ensure maximum airflow, and cooling, through your LH Series amplifier. To clean the fan filters, follow these simple steps:\
1. Remove the fan filter by placing your finger in the depressed area under the fan filter frame.
2. Clean the filter with warm water and let the filter dry thoroughly before replacing.
3. Replace the fan filter by aligning the frame to the top of the panel knock-out, and then, snap the frame back in place.