i have the mm124 sub. i have it on a punch 250 right now to break it in. how long does it usually take before i see a real noticeable diffirence in the sound? i don't want to hurt the sub before i know what its capable of doing. this is my first time dealin with polk subs. i usually run fosgate. i'm only running one sub right now. trying to reach 130 db's. i want to step up to a bigger amp? any suggestions?in the rockford line ofcourse!