The ACE pro (Anycubic Color Engine Pro) is designed for 4*1kg rolls.
This allows you to combine colorful prints or different materials. You can also use the ACE to automatically switch to the next when one role becomes empty. This saves a lot of time because there are no standstill times.
You also have the option of using two ACEs together. Now you have the option to use eight rolls.
You can also dry your filament internally thanks to a 200W heating function.