Hertz DBX 30.3 boxed subwoofer 12" (300 mm).

Hertz DBX 30.3 (DIECI series) boxed subwoofer 12" (300 mm).

The DBX 30.3 is a car audio subwoofer box designed to enhance the audio system performance in the low range frequencies, optimizing the spaces and ensuring a quick, not too invasive installation. 
The subwoofer unit, which is the DS sub, provides a punching, dynamic, surrounding bass. The very thick MDF enclosure, thanks to its rigid and stable structure, doesn’t affect the acoustics. 
The rear slanted panel fulfils two important functions: it reduces back-wave reflections and eases the installation.