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OPERATION ORBAN Model 8400
If you like a larger-than-life, “chesty” sound on male voice, set this control away from
Off. When so set, gating causes the gain reduction of the lowest frequency band to move
to the same gain reduction (minus a gain offset equal to the numerical setting of the con-
trol) as its nearest neighbor when gated. You can therefore set the maximum gain differ-
ence between the two low frequency bands, producing considerable dynamic bass boost
on voice.
The difference will never exceed the difference that would have otherwise
occurred if the lowest frequency band was independently gated. If you are
familiar with older Orban processors like the 8200, this is the maximum
amount of boost that would have occurred if you had set their
DJ Bass Boost
controls to
On.
The amount of bass boost will be highly dependent on the fundamental frequency of a
given voice. If the fundamental frequency is far above 100 Hz, there will be little voice
energy in the bottom band and little or no audio bass boost can occur even if the gain of
the bottom band is higher than the gain of its neighbor. As the fundamental frequency
moves lower, more of this energy leaks into the bottom band, and you hear more bass
boost. If the fundamental frequency is very low (a rarity), there will be enough energy in
the bottom band to force significant gain reduction, and you will hear less bass boost than
if the fundamental frequency were a bit higher.
This control is only available in the Five-Band structure.
If the
Gate Thresh (Gate Threshold) control is turned Off, the DJ Bass boost
setting is disabled.
HF Enhance is a program-adaptive 6 dB/octave shelving equalizer with a 4 kHz turnover
frequency. It constantly monitors the ratio between high frequency and broadband energy
and adjusts the amount of equalization in an attempt to make this ratio constant as the
program material changes. It can therefore create a bright, present sound without over-
equalizing material that is already bright.
Stereo Enhancer Controls
You can operate the stereo enhancer in one of two modes or “styles.” The first emulates
the Orban 222 analog stereo enhancer, while the second mode, called
Delay, emulates a
popular enhancer from another manufacturer that adds a delayed version of the L–R sig-
nal to the original L–R to create stereo enhancement. (See Stereo Enhancement on page
3-7 for more information.)
Both modes have gating that operates under two conditions.
The two stereo channels are close to identical in magnitude and phase.
In this case, the enhancer assumes that the program material is actually
mono and suppresses enhancement to prevent the enhancement from exag-
gerating the undesired channel imbalance.
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