Description
The Boss PQ-4 Parametric Equalizer combines a distinctive set of Boss features, including sweepable mid and high frequencies with matching level controls, an independent low-frequency control with ±18 dB cut or boost, and a master level control also capable of ±18 dB adjustment. Though it was a relatively short-lived pedal in the ’90s—some users found the interface unconventional—this versatile EQ has become a sleeper hit, offering tonal flexibility that many guitarists immediately appreciate.









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