Sony Yeds18 Test Disc Exclusive [better] -

Are you looking to use this disc for a , or are you interested in it as a collectible item ? Sony TEST CD (YEDS-18) (FLAC) - Internet Archive

The is a legendary piece of diagnostic hardware among audiophiles and vintage electronics technicians. Originally designed as a proprietary tool for Sony Factory Service Centers , it was never intended for public sale, making it an "exclusive" and highly sought-after item in the second-hand market today. Why the Sony YEDS-18 is "Exclusive" sony yeds18 test disc exclusive

Measuring channel balance, frequency response, and de-emphasis accuracy. Are you looking to use this disc for