Koss - Digital Delay System - Original Magazine Ad - 1980

Koss - K/4DS Digital Delay System - Original Magazine Ad - 1981

Bose-Koss - 901 Speaker/K/4DS - Original Magazine Ad - 1980

Revox- Audio System - Original Magazine Ad - 1980

Nikko - Audio Components - Original Magazine Ad - 1980

Precept - Cartridges - Original Magazine Ad - 1980

Adcom - Crosscoil Phono Cartridge - Original Magazine Ad - 1980

Akai - Turntables - Original Magazine Ad - 1980