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

well nothing wrong IMHO w/reviving old threads and bringing the topic up to date!

IS THERE?
your comment smacks of ad hominem attacks we see here bunch of old guys ( mostly ) behaving like school yard bullies! and what does your snarky sarcasm contribute ? get real!
as Werner Von Braum said :"we aim for the stars! ................( but sometimes we hit London) " 

i was interested to learn what he is doing / using for a subwoofer(s) Now years later! the Allison group is full of old curmudgens who don't seem to have made many equipment changes for  decades! 
i was excited to find velodyne sub for sale for only $100 but when i went to buy it pick it up  there was big hole he had poked in the rubber surround! the day before so NO sale !