Klark Teknik HELIX SYSTEM DN9344 Operator's Manual page 58

Symmetrical Q
Klark Teknik
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This class of equaliser has the same curves in boost as the constant-Q type, but then has cut responses that are
symmetrical with the boost ones. In other words, the bandwidth in cut is defined not according to our usual
definition of Q (see constant-Q above) but as "the point were the signal is cut by 3dB less than the maximum
cut". Most equalisers described by their manufacturers as "Constant Q" in fact produce symmetrical
responses.
Symmetrical Q
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