TREBLE Knob
The TREBLE knob is also a shelving filter, this time situated at 1kHz. However, the "flat" position (no
boost or cut) on the TREBLE knob is at noon on the dial, and indicated by a small arrow indicator.
The TREBLE control boosts 1kHz & above by +14dB at maximum (fully clockwise) rotation, and cuts
1kHz & above by -6dB at minimum (fully counterclockwise).
Shown below are spectrum analysis charts of the TREBLE control, starting with all controls flat, then
TREBLE at minimum, followed by TREBLE at maximum.
Flat:
TREBLE at minimum (full Treble cut):
SA272
ZIO Analog Bass Preamp + D.I. User Guide
8
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