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PreSonus EQ3B single channel analog EQ

  • 3 bands of fully parametric equalization
  • Each band is overlapping and offers adjustable frequency range, Q, and cut/boost control
  • Faceplate bypass button and 80Hz roll-off
  • -98dB noise floor
  • +24dBu headroom
  • Truly balanced I/O and a wide frequency response
  • Balanced XLR and unbalanced 1/4″ TS inputs and outputs

At a Glance


Great versatility with stellar sound quality.

The Presonus EQ3B Parametric Equalizer offers 3 bands of fully parametric equalization. Each band is overlapping with adjustable frequency range, Q, and cut/boost control. The faceplate also houses a bypass button and 80Hz roll-off. Other specifications include -98dB noise floor, +24dBu headroom, truly balanced I/O, and a wide frequency response. The back of the equalizer unit houses balanced XLR and unbalanced 1/4″ TS inputs and outputs. the EQ3B is powered by an external wall-mounted power supply.




  • XLR Impedance 10k Ohms
  • TRS Impedance 10k Ohms
  • Panel Controls
  • Low Frequency Range 20Hz to 300Hz
  • Mid Frequency Range 200Hz to 3kHz
  • High Frequency Range 2kHz to 20kHz
  • Bandwidth Adjust (Q) .1 to 10
  • Gain Adjust -12dB to +12dB
  • High Pass Filter 80Hz
  • Power Supply
  • Type Linear
  • Insert (TRS)
  • Input 16VAC/1000mA (factory configured)
  • Output
  • XLR Balanced 51 Ohms Impedance
  • 1/4″ TRS Unbalanced 51 Ohms Impedance
  • Performance
  • THD+Noise (Unweighted) 0.006% at 0dB
  • Noise Floor -98dB
  • Signal to Noise >95dB
  • Power Supply Rejection >98dB
  • Power
  • 16 Watts
  • Physical
  • Weight 5lbs.
  • Dimensions 5.5 x 5.5 x 1.75
  • Mounting Universal Rack Tray Insert
  • Chassis Steel
  • Panel Brushed Aluminum
  • Sides Cast Aluminum


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