Either will work fine. When I added a Panamax 5100, I moved my trigger to the 5100. The 5100 has one trigger input but two switches that can be used to control how the trigger behaves - the two high-current outlets (which are where the amp and probably your powered sub need to be plugged in) can be triggered 0, 10, or 30 seconds after the 990 turns on, and the four "switched" outlets can be always on or can be switched off 10 or 30 seconds after the 990 turns off. I currently have my switched outlets always on (none of my other components need the switching ability) and my high-current outlets (one for the sub and one for the amps) set to come on 10 seconds after the 990 turns on.