This is Phase 4 Stereo

"This is Phase 4 Stereo" vinyl record album. 

Back when stereo recording and playback systems were rapidly evolving from the old monaural methods. 

Terms like high fidelity, stereolab, binaural, ambiophonics, 3 dimensional sound, Mercury sound margin control, full range hifi, custom processed and pressed from pure vinylite, 45/45 disc cutting systems, reliable stylus tracking, osmium/sapphire/diamond needle styluses, and many other ultra-modern audiophilic terms.

http://en.wikipedia.org/wiki/Stereophonic_sound

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