Carver C9 Sonic Hologram Generator $299 in 1982...still using this device now with Magnepans.
Absolutely turns 2 channel stereo image to a 3 dimensional Soundstage when speakers are placed as the manufacturer recommends. In all the years I have been into audio this was and still is to me a giant killer! Push a button to completely remove it from the circuit and that huge image disappears back to flat 2 channel music, press the button back to holography...its a huge instant sonic upgrade.
Absolutely turns 2 channel stereo image to a 3 dimensional Soundstage when speakers are placed as the manufacturer recommends. In all the years I have been into audio this was and still is to me a giant killer! Push a button to completely remove it from the circuit and that huge image disappears back to flat 2 channel music, press the button back to holography...its a huge instant sonic upgrade.