HiVi Research D8 woofer

The HiVi D8 represents a design where the voice coil is positioned over an undercut central pole piece with a large thermally stabilized Neodymium magnet at the bottom and a high energy ceramic magnet on the top. 

A specially shaped, CNC machined steel cup completes the magnetic structure form the outside, creating a shielded magnet system with symmetrical flux density distribution along the gap.

The long-throw voice coil experiences a symmetric driving force which substantially decreases inductance and back electromotive force modulations.

The magnet structure is optimized using Finite Element Analysis technique. The result is a radical improvement of driver linearity.

The cone has a shallow, high integrity structure, which is extremely rigid and dynamically stable.

The large voice coil diameter allows for a more uniform cone movement, resulting in clear and accurate reproduction.

The vented design and a high temperature rated voice coil provide a dramatic increase in power handling.

D8 is excellent as a woofer for high power "no compromise" audiophile systems. It also may be used as a subwoofer in various configurations.