Sound Showcase Laboratory Test Record

(EP Promo) 'Test Pattern: 'this record is designed to balance your stereo equipment acoustically. On it, familiar instruments are played first on one channel, then on the other. This allows you to adjust the two channels so that volume and timbre are identical.'
Titles- Record Sleeve: 'Laboratory Test Record' Disc Labels 'Sound Showcase'
Series- Back of Sleeve: 'Wall To Wall Stereo,' Side One Label: 'Wall To Wall Sound,' Side Two Disc Label: 'Wall To Wall Stereo'
Disc Labels: ' Not For Sale'
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