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Chapter 8-1
Advanced Features: Parametric Equalizer (PEQ).
Important Note: Until you are ready to use the PEQ feature set, it should be
disabled by setting all three controls to the full counter clock-wise position.
Background Information: Direct and reflected bass waves in the listening
room will create “standing waves” and associated peaks and nulls in the sub-
woofer frequency response (FR). The PEQ allows you to reduce the severity
of a peak in the subwoofer frequency response, thus obtaining a more accu-
rate sound.
Control Explanation: The PEQ has three controls: Frequency, Bandwidth,
and Level. An image of the PEQ control is provided below (your subwoofer
controls may vary).
The Frequency control (labeled “Freq.”) affects the target the frequency
where the PEQ cut will take effect, and has a control range of 20-80 Hz.
The Bandwidth control (labeled “Q”) affects the width of the PEQ cut. The
“HI” setting is the narrowest bandwidth, and the “LO” setting is the widest
bandwidth. In most cases, it is best to start with a Hi Q setting (narrow band-
width).
Below is a frequency response graph of the SVS SB12-Plus as measured
under quasi-anechoic conditions. This set of curves illustrates how the PEQ
function works and what type of cut effect you can expect from various Q
settings.
Green Line: Native frequency response of the subwoofer.
Purple Line: Frequency = 50 Hz, Q = HI, LEVEL = MAX.
Yellow Line: Frequency = 50 Hz, Q = LOW, LEVEL = MAX.