Orban Optimod-FM 8300 Operating Manual page 140

3-22
OPERATION
Because the Five-Band structure often increases the brightness of program material,
some bass boost is usually desirable to keep the sound spectrally well balanced. Ad-
justment of bass equalization must be determined by individual taste and by the re-
quirements of your format. Be sure to listen on a wide variety of radios — it is possi-
ble to create severe distortion on poor quality speakers by over-equalizing the bass.
Be careful!
The moderate-slope (12 dB/octave) shelving boost achieves a bass boost that is more
audible on smaller radios, but which can sound boomier on high-quality receivers.
The steep-slope (18 dB/octave) shelving boost creates a solid, punchy bass from the
better consumer radios with decent bass response. The 6 dB/octave shelving boost is
like a conventional tone control and creates the most mid-bass boost, yielding a
"warmer" sound. Because it affects the mid-bass frequency range, where the ear is
more sensitive than it is to very low bass, the 6 dB/octave slope can create more ap-
parent bass level at the cost of bass "punch."
There are no easy choices here; you must choose the characteristic you want by
identifying your target audience and the receivers they are most likely to be using.
Regardless of which curve you use, we recommend a +2 to +5 dB boost for most
Equalizer Controls
Group Basic /
Full Modify
Name
Bass Shelf BASS FREQ
BASS GAIN
BASS SLOPE
Low LF FREQ
LF GAIN
LF WIDT
Mid MID FREQ
MID GAIN
MID WIDTH
HIGH FREQ
High
HIGH GAIN
HIGH WIDTH
Brilliance BRILLNCE
HF ENH
HF Enhancer
DJ Bass DJ BASS
30HZ HPF 30HZ HPF
Phase Rotate PH-ROTATE
Table 3-2: Five-Band Equalization Controls
Advanced Range
Name
Bass Frequency 80, 85, 90, 95, 100, 105, 110,
115, 120, 125, 130, 135, 140,
145, 150, 160, 170, 180, 190,
200, 210, 220, 230, 240, 250,
270, 290, 310, 330, 350, 380,
410, 440, 470, 500Hz
Bass Gain 0 ... 12 dB
Bass Slope 6,12,18 dB / Oct
Low Frequency 20 ... 500 Hz
Low Gain –10.0 ... +10.0 dB
Low Width 0.8 ... 4 octaves
Mid Frequency 250 ... 6000 Hz
Mid Gain –10.0 ... +10.0 dB
Mid Width 0.8 ... 4 octaves
High Frequency 1.0 ... 15.0 kHz
High Gain –10.0 ... +10.0 dB
High Width 0.8 ... 4 octaves
Brilliance 0.0 ... +6.0 dB
High Frequency 0 ... 15
Enhancer
DJ Bass Boost Off, 1... +10 dB
30 Hz High Pass Off / On
Filter
Phase Rotator Out / In
ORBAN MODEL 8300