One of the earliest publicity pieces for the Lab Series amplifiers placed in mid 1978. Unlike the majority of adverts for these amplifiers to follow, this one is short on text, letting the images do the talking. Ronnie Montrose is featured playing his Gibson doubleneck EDS-1275, and the 2x12" Lab Series L5.
The ad highlights Montrose's newly released fusion album Open Fire, released in January 1978
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