The EKKO 616 MKII features these updates:
– The modulation range has been massaged to allow much finer tuning for a more balanced overall effect
– The MIX pot now allows louder effect levels
– Improved buffering circuit resulting in flat response and allows hotter inputs, which makes it great for keyboard or outboard use!
– Redesigned protection circuit for enhanced component safety
https://malekkoheavyindustry.com/product/ekko-616-mkii/