An interesting read, brought back memories - The Biggest Failures in Consumer Audio/Video Electronics History I remember my first attempt - adding a rear channel with two 4 ohm speakers in series and hooking it up to the B speaker outputs of my Marantz receiver circa 1977. Did help a tiny bit with certain recordings. Later added a quadrial adapter to the receiver and it was barely better. Did not remember the Finial Laser Turntable from 1986. I think there might be a market for it today if the limitations can be worked out. Of course everyone remember the Betamax vs VHS format battle.