PQ-3B Bass Parametric Equalizer

Bass Parametric Equalizer

The PQ-3B is a three-band bass parametric equalizer that features Low, Middle and High bands. Each band allows you to set the frequency and level. The level can be boosted or cut with 18dB which is the highest of any Boss pedal. The low band ranges from 25Hz to 400Hz, the middle band from 160Hz to 2.5kHz while the high band covers 1kHz to 16kHz. The level control is placed before the filters and can be used to correct the volume difference between the effect and straight sounds.

Controls: Low Level, Low Frequency, Middle Level, Middle Frequency, High Level, High Frequency, Level
Connectors: Input, Output, AC Adaptor
Current Draw: 25 mA (DC 9V)
Weight: 410g (15 oz.)
Input Impedance: 1Mohm
Output Impedance: 1kohm
Residual Noise Level: -98 dBm or less(IHF-A) (all controls: center) 0 dBm = 0.775 V
Recommended Load Impedance: 10kOhm or greater
Recommended AC Adaptor: PSA Series

Silver – Made In Taiwan
The PQ-3B was sold from March 1991 to December 1995.


  • 73 mm wide
  • 129 mm high
25 mA / 9 V DC / Negative Center

This Pedal is discontinued.

submitted Jul 21st 2017, 20:55 by icjburke | last Change Dec 13th 2019, 20:57 by motorhead412