Too much bass at a neck pickup

Typical problem of many guitars equipped with humbackers is too high level of bass from a neck pickup comparing with a bridge pickup. If a guitar is connected to DVO or GSC (or any other device with the input impedance 1 MΏ) it is recommended to correct this guitar electronic circuit according to the diagram below. Bass correction is maintained by the additional C3 capacitor. Its capacitance have to be adjusted to the required cut bass level (e.g. from 2.2 nF to 4.7 nF). On the diagram below, comparing with a typical circuit, there are also corrected capacitances of C1 and C2 (defining the range of treble adjustment) from the value 22 nF to 2.2 nF or 4.7 nF.

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