Orban OPTIMOD-FM 5500 Operation Manual page 148

3-24
OPERATION
MID FREQ determines the center frequency of the equalization, in Hertz.
Range is 250-6000Hz.
MID GAIN determines the amount of peak boost or cut (in dB) over a
10 dB range.
MID WIDTH determines the bandwidth of the equalization, in octaves.
The range is 0.8-4.0 octaves. If you are unfamiliar with using a parametric
equalizer, 1 octave is a good starting point.
The audible effect of the midrange equalizer is closely associated with the amount
of gain reduction in the midrange bands. With small amounts of gain reduction, it
boosts power in the presence region. This can increase the loudness of such material
substantially. As you increase the gain reduction in the midrange bands (by turning
the (Multiband Drive) control up), the
M D
ULTIBAND RIVE
gressively less audible effect. The compressor for the midrange bands will tend to
reduce the effect of the Mid frequency boost (in an attempt to keep the gain con-
stant) to prevent excessive stridency in program material that already has a great
deal of presence power. Therefore, with large amounts of gain reduction, the den-
sity of presence region energy will be increased more than will the level of energy in
that region. Because the 3.7 kHz band compressor is partially coupled to the gain
reduction in the 6.2 kHz band in most presets, tuning
ing up the control will decrease energy in the 6.2 kHz band — you will be
M G
ID AIN
increasing the gain reduction in both the 3.7 kHz and 6.2 kHz bands. You may wish
to compensate for this effect by turning up the
Use the mid frequency equalizer with caution. Excessive presence boost tends to be
audibly strident and fatiguing. Moreover, the sound quality, although loud, can be
very irritating. We suggest a maximum of 3 dB boost, although 10 dB is achievable.
In some of our factory presets, we use 3 dB boost at 2.6 kHz to bring vocals more up-
front.
High Frequency Parametric Equalizer is a parametric equalizer whose boost and
cut curves closely emulate those of an analog parametric equalizer with conven-
tional bell-shaped curves.
HIGH FREQ determines the center frequency of the equalization, in
Hertz. The range is 1-15 kHz
HIGH GAIN determines the amount of peak boost or cut over a 10 dB
range.
HIGH WIDTH determines the bandwidth of the equalization, in octaves.
The range is 0.8-4.0 octaves. If you are unfamiliar with using a parametric
equalizer, one octave is a good starting point.
Excessive high frequency boost can exaggerate tape hiss and distortion in
program material that is less than perfectly clean. We suggest no more
than 4 dB boost as a practical maximum, unless source material is primar-
ily from compact discs of recently recorded material. In several of our
presets, we use this equalizer to boost the upper presence band (4.4 kHz)
slightly, leaving broadband HF boost to the B
controls.
ORBAN MODEL 5500
control will have pro-
M G
ID AIN
to 2-4 kHz and turn-
M F
ID REQ
control.
B
RILLIANCE
and/or HF E
RILLIANCE NHANCE