Preference of Denmark went bankrupt in 1989, but not before producing the coolest looking pyramid shaped speakers the world has ever seen... : r/vintageaudio
pyramid speakers. 4 inch set in box model 4477 180 watts also included 2 speaker | eBay
Pyramid - PMBH1539 - Sound and Recording - PA Loudspeakers - Cabinet Speakers
Kworld Dark Pyramid D15u+ Speaker Review | eTeknix