Hi, im constructing a new ht set up and i was picking out my sub, i wanted to get this klh one

http://www.bestbuy.com/site/olspage....5&type=product

When I was reading the specifications it says: Required Amplifier Power: 125w. Now this is only a 125w peak performance sub... Does that mean 125w total reciever power? Or 125wpc? I just cant believe it would require as much wats as its peak performance is. And then below it, it says Assembly Required, what is that supposed to mean? Assembly by attatching it to a ht system or what?

My alternative to that sub would be this 1 .

http://www.bestbuy.com/site/olspage....5&type=product

Plz tell me which one youd prefer, thx for the input ^^