Amazon.com: Pyramid 10 Inch Car Subwoofer Speaker - 500 Watt High Powered Car Audio Sound Component Speaker System w/ 2 Inch High-Temperature Kapton Voice Coil, 85.6 dB, 8 Ohm, 60 oz Magnet - Pyramid PW1048USX : Electronics
Preference of Denmark went bankrupt in 1989, but not before producing the coolest looking pyramid shaped speakers the world has ever seen... : r/vintageaudio
Best Buy: Pyramid 4-way 800 W Speaker PP15
Pyramid 10 In Rawframe Speaker | PSSL ProSound and Stage Lighting
Pyramid Shaped Boombox Stereo Speakers by Radio Shack Vintage - Etsy
Speaker Builder: The Pyramids By Rudiger Geppinger | audioXpress