wallcolmx
Mas intense yun heat sa higher voltage.
They even recommend 16v
and 18-21v only if we're using fan.
My personal experience on my MT21:
in just a minute, 19v 4.32a with all knobs not exceeding half volume with 4.7inch subwoofer only and 25wbookshelves, my temps rose as high as 40 to 50...