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Recommended for coupling of line level audio or common-talk phones into amplified sound systems, background music and paging systems, recording equipment, or studio electronics. Built-in potentiometer provides optional adjustability for the 25K output level. The 600-ohm input may be matched to 600, 10K, and 25K- ohm circuits. All components are mounted on a printed circuit board. Steel chassis includes mounting ears and “insta-mount” tape. Transformer is shielded to minimize induced hum. Unit in