Kube 8 MIE8 inch front firing active subwoofer The compact Kube 8 MIE may not take up much space, but the bass it delivers is far from small. With an 8 inch driver, it is ideally suited for smaller rooms. By sharing the same 300 Watts Class D amplifier from it's larger siblings, Kube 8 MIE exhibits unprecedented levels of control. With Music Integrity Engine, the Kube 8 MIE is optimised to dynamically extend the bass depth.