This is a general information question from a electronics dummy.

I'm thinking about my S99 project which is building a 3-way system around the LE14A and wondering about level controls for the tweeters and mids.

My L110's have controls that act like potentiometers, that is, they rotate freely but the S99 tweeter level controls have three click stops.

I'm guessing the "click-stop" type control selects different resistor values while the "potentiometer" type is a resistor in and of itself. Am I in the ballpark?

What are the advantages vs disadvantages of either type?