Decide what you want to feel
Describe your music, preferred listening level, and what your current system lacks. Two subwoofers are not automatically the right answer for every project. Compare the goals, available space, and budget with a system the shop can actually fit and support.
Plan the enclosure and electrical match
Diamond Audio DMD Series options need to be considered with their exact specifications. Enclosure requirements, final impedance, amplifier compatibility, and wiring belong in one plan. Ask for those details to be identified rather than selecting components independently.
Keep the trunk useful and the equipment secure
Explain your cargo needs, access requirements, and any future vehicle plans. Discuss mounting, power wiring, protection, and ventilation as part of the installation. Ask how the system will be checked and how to use any added level controls responsibly.