Great working unit with built in power cable and rack mount bolts/washers.

The AB International Model 131 is a single-channel, 31-band (1/3-octave) analog graphic equalizer designed for live sound reinforcement, recording studios, and permanent installations.

Key Features & Specifications

  • Type: Analog single-channel graphic equalizer
  • Layout: 31-band (1/3-octave) ISO spacing for precision cuts and boosts
  • Frequency Response: 20 Hz to 20 kHz
  • Form Factor: Rack-mountable design
  • Controls & Indicators:
    • Passive bypass switch
    • Low-cut filter
    • Overload LED (typically triggering 5 dB below clipping)
    • RFI filter protection

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

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Listed6 days ago
ConditionVery Good (Used)
Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more
Brand
Model
  • 131 Graphic Equalizer
Finish
  • black
Categories
Year
  • 2000's
Made In
  • United States

Product safety information may be available here.

Synthervention Therapy

Abingdon, VA, United States
Joined Reverb:2015

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