The M-Cube 5.1 is one of the few home theater systems that uses NXT speaker technology but doesn't emphasize flat cabinetry. NXT technology was designed to radiate sound uniformly throughout the room by vibrating large panels rather than magnetic cones. A lot of audio designers fell in love with the ability to produce flat speakers, despite the fact that cubic NXT speakers sound significantly better. So many flat NXT speakers were produced that the technology itself has been mischaracterized as flat-sounding and tinny.
The M-Cube 5.1 has gotten a number of excellent reviews. A review of the M-Cube in The Daily Mirror said:
Performance-wise the M-Cube really is something of a marvel. The way sound disperses throughout a room when using the system really needs to be heard to be believed. The wide-range of the panels used in the satellites means there really isn't a best-seat in the house as the sound feels balanced throughout the whole room.
The M-Cube system, which comes with five satellite speakers and a powerful 250-watt subwoofer, was engineered using distributed mode loudspeaker (DML) flat-panel technology, which combines wide-ranging acoustics with freedom in aesthetic design.... Mission had the flexibility to team with British designers Seymour Powell to create a compelling cube-shaped housing that measure 3.5 inches in each direction.