Do not come here unless you already know what your doing. Will wire your subs up to a point where they will blow and claim its your fault. Common sense says leave it at a decent level and let the customer know how to adjust it to give it more bass. NOT maximize the bass so when you change songs it will mess them up. The guy I spoke to was RUDE and hung up because«he didn’t have time for this» once they have their money your on your own.