I have an Infinity 12'' subwoofer. I am currently working on the enclosure which will be ported. Here is the specs sheet in a pdf file format attached. My question, How many hertz do you think I should tune the enclosure to? Does this amplifier match my subwoofer specs? (Amazon.com: Infinity Reference 1300a 300-Watt, High-Performance Mono Subwoofer Amplifier (Silver/Black): Car Electronics) If not, Which amp would you recommend well under $180.00?