The API 550B 500 Series equalizer is a 4-band workhorse based on classic discrete console EQ circuitry. Its musical curves and forward tone have been a standard for drums, vocals, and guitars on thousands of records. API's "Proportional-Q" circuitry gives tighter, laser-like bandwidth with extreme boosts and cuts, and broad strokes when you just need a couple dB here and there. Whether you're just getting into the 500 series, or have a Lunchbox with an empty slot, you owe it to yourself to try out the 550B and see what it brings to your tracking and mixing.

Product Specs

  • 550B 500 Series 4-Band Equalizer Module
  • Black
  • 2010s
Made In
  • United States

From the Price Guide

Reviews for the API 550B 500 Series 4-Band Equalizer Module
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  • The most versatile 500 series EQ

    Verified Purchase

    Just nearly two weeks ago I have got my first Api 550b Equalizer and since then I've never looked back. I have bought already a second one to use them for stereo sources as well. I love the clarity and punch in the low ends and mids as well. From my personal point of view this piece of gear is the …

  • great gear

    great gear