A certain amp is not required to break in a subwoofer, playing it normally over time will help it loosen up the suspension. As far as thinking you need rated power to get your subs moving, that's incorrect as there is no such thing in underpowering a subwoofer. Just save up and get the amp you want now, it will save you more in the long run. Instead of rushing to have a completed system, slow down and do it right the first time. If that is all you want to spend on an amp period the go quality over quantity. Try to find a good brand amp at your budget level instead of more power lesser quality, you may have to buy used.