[header] How to get a sponsor for sound offs [title] Design the sound system for your car. [step] Unless you already have some celebrity status in the automotive or audio industry, you should approach a respected car audio store to help you select the products and design the system. [title] Research potential manufacturers of each part of the audio system. 
[step] Try to find at least 2 candidates for each part. For each manufacturer, carefully list the model number of the product you need, as well as the contact details of the marketing director of each company.