How to increase subwoofer output without upgrading your amp and sub

Hi everyone!
I received a pretty good question from a reader who wanted to know how he could increase the quality and output from his current amp and sub without upgrading or adding any additional amps or subs. Here’s his current set up: Stock stereo system and line output convertor, an Alpine Type R 12″ in a 1.7 cubic foot ported enclosure with an Alpine PDX-M6. If you’re wondering what you can do to get better output and better bass response with your current amp and sub set up, check out my response: