"The two channel Fairchild 670 is the “Holy Grail” of compressors in studio gear esoterica, not only because of its price (around $30,000 on the vintage market), but its extreme rareness and the difficulties in maintaining such a piece. With 14 transformers, 20 vacuum tubes, and a 6 rack-space encompassing girth, the 670 is the heavyweight champion of compression weighing in at 65 pounds ... "
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