The Hertz DBX 25.3 is a preloaded subwoofer enclosure designed to improve car audio low-frequency response. It houses the DS sub driver to deliver punching, dynamic, surrounding bass while optimizing cabin space.

The enclosure is built from very thick MDF for a rigid, stable structure that minimizes acoustic coloration. A rear slanted panel reduces back-wave reflections and simplifies installation, allowing a quick, noninvasive fitment into compatible vehicle trunks or cargo areas.