The vented QUANTUM QSB enclosures feature a very compact design . With an impedance of 2+2 ohms each, the subwoofer can also be operated in 4 ohms or even in 1 ohm in order to get the maximum out of the amplifier. Thanks to the large voice coils (50 mm at the QSB6 and 64 mm at the QSB8 and the new model QSB10, these subwoofers are designed for a dynamic performance and can be powered by even more powerful amps. Thanks to the flat design, the new QSB enclosures find the right place in almost every vehicle. With a height of only 16 cm, the QSB6 box can even be placed in a double floor of the trunk, or for example behind the seat. The included protection grilles protect the woofers optimally in all models.