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- Black Lion Audio B173 500

- GAIN (stepped, 12-position switch): clockwise rotation yields an increase in input signal amplitude, counterclockwise rotation yields a decrease in input signal amplitude
- 48V: engage to turn phantom power on, disengage to turn phantom power off
- PHASE (Ø): engage to adjust input signal polarity by 180°, disengage to leave input signal polarity unchanged
- OUT LEVEL: clockwise rotation yields less attenuation, counterclockwise rotation yields more attenuation (for beginners, it’s best to leave the output level fully clockwise and increase Gain as needed so as not to saturate the input transformer)
- Hi-Z: engage to select faceplate TS jack as input source, disengage to select XLR input jack on 500 series rack as input source (GAIN does not adjust signal level, however, OUT LEVEL does attenuate the signal)
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