PreSonus RC 500 - Manual (Page 7)

RC 500 Owner’s Manual
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2.3 EQ Controls
Low Band Frequency. Sets the center frequency of the EQ’s low-frequency band.
You can adjust the center frequency between 20 and 400 Hz.
Low Band Gain. Sets the attenuation or boost of the EQ’s low-frequency band. The
gain can be set between -16 and +16 dB.
Low Band Shelf. By default, the low band of the EQ is a standard peak filter with a
fixed Q of 0.6. When the Shelf switch is engaged, the low band functions as a shelving
filter.
Power User Tip: A shelving EQ attenuates or boosts frequencies above or below a
specified cutoff frequency. In practice, these types of EQs are much like the treble and
bass controls on a car stereo. Like a bass control, a low-shelf filter will raise or lower
the gain on all frequencies below the specified cutoff frequency. A high-shelf filter
will raise or lower the gain on all frequencies above the specified cutoff frequency,
just like a treble control. Shelving EQs can be used to make big changes to the
sound very quickly by adding or removing an entire frequency range at once.
In contrast, a peak EQ offers continuous control over the center
frequency of the band and over the level (boost/cut) of the designated
frequency band, which makes it capable of more subtle changes.
Mid Band Frequency. Sets the center frequency of the EQ’s mid-frequency band.
You can adjust the center frequency between 400 Hz and 5 kHz.
Mid Band Gain. Sets the attenuation of boost of the EQ’s mid-frequency band. The
gain can be set between -16 and +16 dB.
High Band Frequency. Sets the center frequency of the EQ’s high-frequency band.
You can adjust the center frequency between 2 and 20 kHz.
High Band Gain. Sets the attenuation of boost of the EQ’s high-frequency band. The
gain can be set between -16 and +16 dB.