These filters have a relatively low “Q” thus preventing “ringing”. Ringing occurs when a filter instantaneous-
ly receives an input signal and hangs on to the signal for a period of time after it has stopped (see Figure 2
below).
All three equalizers have a flat phase response (see Figure 3 below) for accurate sound reproduction
with no coloration to your speaker system. This maintains pure stereo imaging without the “comb filter”
effect. As your ear passes across the stereo plane of your system, the comb filter effect sounds like “peaks”
and “nulls” in the response which can change the imaging dramatically.
4
LS1-131/LS2-215/LS3-231
Constant Q Graphic Equalizers
Figure 2: Q vs. Ringing:
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