ALESIS PEQ-450 - Manual (Page 29)

chapter 3 • basics of equalization
PEQ-450 Reference Manual 29
Q
Q
is a ratio of the center frequency divided by the bandwidth. A Q
setting of 0.5 is a wide band of boost or cut, where a setting of 3 is a
narrow band of boost or cut. A setting of 0.25 is even narrower and is
typically used for notching a small frequency due to reduce noise.
The Q control of the PEQ-450 has a range of 0.25 to 16.
40Hz 200Hz 1kHz 10kHz 20kHz
Narrow Q Wide Q
The LOW SHELF setting effects everything below the specified
frequency. For example, if Band 1 is set for Low Shelf and the
frequency is set to 800Hz, everything from 800Hz on down will be
boosted or cut.
0dB
+3dB
+6dB
+9dB
+12dB
-12dB
-9dB
-6dB
-3dB
40Hz 200Hz 1kHz 10kHz 20kHz
Frequency
Gain
HIGH SHELF works the opposite way. When this function is turned on,
everything from the set frequency on up will be effected.