Dear Cerwin-Vega Mobile Customer, Thank you for making Cerwin-Vega Mobile your choice for high performance car audio products. At Cerwin-Vega Mobile our goal is to produce products of unsurpassed quality. We believe you will not find a better value anywhere in the mobile audio environment. To ensure that your new Cerwin-Vega Mobile speakers provide years of enjoyment you should consider having them installed by a professionally trained technician.