Hi All I am unable to set the MAX level on the L5504AMP unit. I have 12 of these units on a job and all are the same. You can set the level in software to 50% and save but it dose not stop the output going to 100% ie 10 Volt. I have overcome this problem by using logic to set a max level but it would be nice to have the MAX feature working as it is imperative that the output dose not go over 5 Volt. Any answers Regards Graham Lamb