Hertz DBX 30.3 12" 4-Ohm Subwoofer Enclosure Double DIN Head Units and overall height is 2

and overall height is 2

and the design is described as waterproof

AV input and output connections also allow it to work within a broader vehicle multimedia setup

the user can adjust master volume

Hertz DBX 30.3 12" 4-Ohm Subwoofer Enclosure Double DIN Head Units and overall height is 2The Hertz DBX 30. 3 is a passive 12 inch subwoofer enclosure designed to add low frequency output to a car audio system without requiring a custom built box. Its factory enclosure helps simplify a bass upgrade where available trunk or cargo space is limited. It is intended for use with an external amplifier matched appropriately to its 4 ohm load and 250 watt continuous power rating. This enclosure is suited to listeners who want a dedicated bass