This QUANTUM QXB bassreflex system was specially developed for the new QXE12D2 subwoofer. The enclosure, decorated with high quality sticks, is made of solid 18 mm thick MDF. The front panel is even double reinforced and brings it to a wall thickness of 36 mm. Inside, braces provide perfect stability to prevent unwanted vibrations and noises. The high-quality woofer is optimally protected by the attached 4-fold protective grille. The integrated dual terminal with an impedance of 2+2 Ω allows the serial as well as a parallel connection to the amplifier.