what impedence does the amp put out it's 900w rms at ? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifanyone have ideas on a 15" sub that has great sq and still can bang every now and then. amp is around 900rms. budget for sub around 350 or less.