PART THREE – OPTIMIZEGoal• To help you choose the Digital DrivePLUS optimization option and user interface that are right for you.Recommended If• You are unfamiliar with the Digital DrivePLUS optimization options for getting the best bass response for your listeningroom and preferences.• You are unfamiliar with the optimization parameters for a subwoofer.What’s in this Part• Comparison of the Place & Play, Self-EQ, Auto-EQPLUS and Manual-EQ optimization options available forDigital DrivePLUS subwoofers.• Description of what subwoofer parameters you can automatically and manually customize using each optimization option.• Description of the user interface choices for performing Manual-EQ optimization.PART FOUR - MAINTAINGoal• To help you understand the Digital DrivePLUS safety, care, warranty and service information.Recommended If• You want to know what how to protect your investment in your Digital DrivePLUS.• You want to register your subwoofer’s warranty.What’s in this Part• Listing of the safety guidelines to follow when using your Digital DrivePLUS.• Listing of the recommended maintenance and care of your Digital DrivePLUS.• Listing of service and warranty information for your Digital DrivePLUS.MANUAL CONVENTIONSReceiver: For simplicity, “receiver” is used throughout this document to refer to your audio receiver or surround sound processor. Many audiosystems use receivers, but more complicated and updated systems use surround sound processors or controllers.[ 4 ]Digital DrivePLUS User’s ManualINTRODUCTION