Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [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.

Ending1: [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. Ending2: [step] Look through through the data sheet available at the audio store and use it to help you determine the most efficient way to add a sound system to your vehicle. Some good sources include : [substeps] Thesoneste verified car music technology. Ending3: [title] Evaluate different manufacturers of the mixture of audio equipment and electronic devices used in your car. [step] Make sure these manufacturers offer their sound systems well that technical specifications are not variables. Ending4: [step] Watch out for independent companies that are unsure of the costs used, or do not have the expertise to make sound systems. [title] See if you are eligible to obtain an electric guitar neck cut.

Answer format: ending1/ending2/ending3/ending4