15. MASTER output (or Main or Mix) = channels 1-2 (2 x RCA, and 2 x 1/4" /
6.35 mm mono jack), for connecting active speakers
16. MIC (microphone) input (1/4" / 6.35 mm mono jack): balanced input,
compatible with both balanced and unbalanced microphones
17. AUX (auxiliary) stereo input (2 x RCA, and 1 x 1/8" / 3.5 mm stereo mini-
jack)
18. USB port (type B)
19. Hercules Add-On Reserved: reserved extension port
20. Stereo headphones output (1/4" / 6.35 mm stereo jack, and 1/8" / 3.5
mm stereo mini-jack)
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15
18
19
17
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