From my understand pots hold back some of the signal, like a 250k pot will not allow as much to go through as a 1 meg pot. Recently I saw these volume boxes on ebay for like twenty bucks, which are just devices that act as a mastyer volume. So I decided to just make one. So I grabbed two output jacks and a 500k pot and wired it up as a volume knob. If I put this in my effects loop, will it hold back more of the signal or no? Sorry If I'm not being very clear.