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The S 800 D rears are a dipole design, which is THX’s recommended way of presenting surround sound. They’re designed to be mounted on the wall, and for that reason you’ll find a sturdy bracket on the back and two rods at the bottom that keep the cabinet at the right distance from the wall.
On the back of the speaker facing the wall is a 130mm carbon fibre woofer that’ll give rear effects some low-frequency depth, while on either side are a 100mm midrange driver and 25mm dome tweeter. The sound reflects off the walls, making it unclear where effects are emanating from, resulting in an open, enveloping ambience.
Not only is the S 8000 SW one of the largest subwoofers we’ve seen, but it’s also unique in its ability to meet the THX Ultra 2 specifications using a single 300mm bass driver. This is made all the more remarkable by the fact that the casing is two-thirds smaller than its Theater 8 predecessor. The key is low distortion and high efficiency, which enables the 500W amplifier to reach the required levels set out by THX and to easily fill a room of up to 100 square metres.
If you can’t find a corner for this massive subwoofer then it’ll make a cracking coffee table with its stunning gloss black finish. Alongside the fins and bass reflex openings on the rear panel is a frequency knob to set the crossover point between 40Hz and 240Hz, plus a range of connections including phono in/out and four sets of speaker terminals. On the front is an aluminium panel embedded with LEDs that indicate the sub’s status, while the supplied remote lets you switch the phase and activate the THX setting.