Mission Loudspeakers M-5ds 78 ds

I purchased these excellent surround sound speakers brand new.
They are not m-5ds speakers, they are 78ds surround sound speakers. 


78ds surround sound loudspeaker
The Mission 78ds offers a high definition bipolar surround loudspeaker in an elegant and visually attractive package. Behind the beauty of the superbly styled and crafted enclosure lies the result of much skilful and creative engineering. The design solutions employed within the 78ds are novel, while the manufacturing techniques are among the most advanced in the world. The 78ds will satisfy the most fastidious audiophile and its superb finish and aesthetics will blend harmoniously into any room.
• The bi-polar driver configuration results in an ideal combination of diffuse sound field and an ability to provide localised rear effects from Dolby Digital and DTS sources. Because the bi-pole design produces a coherent sound field across a wide listening axis, the 78ds can also be used for multiple rear speaker arrays, such as Dolby EX, without positioning and phasing problems.
• The standard of precision and finish in the 78ds cabinets, found only in some exotic designs of an order of magnitude greater cost, exemplifies the attention to detail and Mission’s commitment to total quality concept.
• Precision-moulded enclosure walls are used in combination with a highly rigid and optimally damped MDF base chassis to control resonance energy, so minimising coloration smear. Integral foam damping further reduces cavity resonance.
• The unique implementation of Keraform ceramic matrix LF drivers is a Mission first. Having a greater stiffness to mass ratio than any previous drive unit material, performance parameters for bass performance, transient attack, and detail resolution are exceptional, and set new standards at this price point.
• Like all the components in the Mission 78 series, the 78ds is carefully voice matched to complement every speaker in the range. This ensures that all the loudspeakers in a 78 series AV setup combine to create a seamlessly integrated sound field throughout the room.