The ultrarare Wharfedale Option 1. Only 8 pairs ever made during the mid 80s. Full dipoles, actively crossed over and with Quad current dumper amplifiers in the pod at the bottom, and a balanced input. The large enclosure at the back was a bass reflex subwoofer that could be turned off if you only wanted it to go down to only 35Hz. The amplifiers were heat sunk to the bottom pod, which was cast aluminium. The reflex enclosure pod at the back was fibreglass skins around a honeycomb core. It could go to 120dB without breaking out in sweat. Unfortunately, although apparently the sound was stunning, the price tag was about £10k (about £35k in today's money). Now if it was a Mark Levinson Cello speaker, or Apogee etc it would have stood a chance of selling. But it was hobbled by being a Wharfedale, which at the time made high volume consumer audio speakers, and not high end things like Option 1. Crap name too.
Brochure-Wharedale-OptionOne.pdf