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Using the HF CurveShaper
EQ
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The RPQ500 features a unique CurveShaper
circuit that enables you
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to add a little extra "presence" or "air" to the pickup to compensate for
high-frequency losses that are inherent to most ribbon microphones, the
result of distant mic placement, or an overly "dry" acoustical environ-
ment. This circuit functions similarly to a conventional parametric shelv-
ing boost, but with a significant difference: the slope varies as both the
HF Frequency and HF Gain controls are adjusted.
Once the HF In switch (ref. #3) is depressed to IN/ON position, adjust
the continuously variable CurveShaper
control (ref. #4) to tune the
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filter to the +3 dB break-frequency at and above which you want to intro-
duce the boost. Then, dial-in the amount of boost you desire with the HF
Gain control (ref. #2). The two controls are interactive, so as with the LF
filter, listen carefully to determine at what frequency and gain setting you
achieve satisfactory results.
In Line Input Mode, the CurveShaper
becomes a versatile EQ to add
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presence or air to any line level signal on a mix or even mastering.
Be careful when you add HF gain because this also affects the overall
gain structure of the preamplifier and could introduce overload distortion.
After you make this adjustment, you may need to reduce the Input Gain
control (ref. #10) correspondingly to compensate for the HF signal boost.
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