Two subwoofers


Simple question: If you have two subwoofers in the same system properly placed apart and balanced in the room, should they be exactly the same models, amp types and and have matching power outputs? Is it possible if you have two different types that they could be out of sync? For example, if one is a class AB analog amp at one power output and the other a class D digital amp at a higher rated power output, could they be out of sync even slightly?
pdn
I use a pair of Velodyne HGS-15s controlled by an SMS-1. I recently bought a pair of SMS-1s with the thought that I might try an SMS-1 for each HGS-15 and use the third SMS-1 in another setup with an HGS-10. I can't quite get my head around the efficacy of a separate SMS-1 for each HGS-15, because it seems that it's the combined output of the subs that one wants to equalize. Nevertheless, the Manual for the SMS-1 covers using them in tandem, so I plan to try it.

db
Where you get the SMS 1's? It is not for sale on the Velodyne website anymore. I want to use two for my setup.
Thx.
Audioquest4life
I bought the two SMS-1s from a guy in Wyoming, I think. It was probably a listing on Audiogon.

db