A basic Acoupower loaded box provides substantially more output and less distortion than many super high end subwoofer systems- even those costing in the neighborhood of $50,000.   We sell direct.   We sell to the Audiophile in quantities of one, as well as to manufacturers in quantities of several dozen.   You are welcome to put together a system of your own.   If you are not up to that much effort, please contact Acoupower for information on custom and standard systems offered by our OEM customers and partners.   We will be happy to point you in the right direction for awesome bass performance at an excellent price.