API Audio 550b Discrete 4 Band EQ

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API Audio 550b Discrete 4 Band EQ

API Audio

550b Discrete 4 Band EQ

4.5 Expert Rating

Product Info

Article Number: 246901
Model: 550b Discrete 4 Band EQ
Price: $1,571.90

* Prices may vary. Check retailer for current pricing and availability.

The API 550b is a modern reissue of a legendary console EQ, and it absolutely delivers that classic API sound. It's fantastic for adding polish to vocals, tightening up bass, or just generally shaping a mix—especially if you're chasing that vintage, analog vibe. This is a must-have for engineers and producers who appreciate the character of API gear.

Product Description

  • API Audio 550b Discrete 4 Band EQ
  • Discrete 4-band equalizer
  • From the 500 series
  • 7 centre frequencies selectable per band
  • 12 dB of boost / cut per band
  • EQ band 1 and 4 in selectable shelf / peak characteristics
  • Traditional API circuit design
  • Headroom up to +30 dB
  • In / Out switch
  • Reissue of the 1967 API 550EQ with an additional band
  • Requires the API Lunchbox 500-6B or 500 VPR slot rack
PROS
  • • Classic API tone delivers warmth and precise shaping
  • • Discrete circuitry provides exceptional headroom and clarity
  • • Flexible band characteristics offer versatile EQ options
  • • Robust build quality ensures longevity and reliable performance
CONS
  • • Premium-priced, a significant investment for most studios
  • • Requires a 500 series rack, adding to overall cost
  • • Limited to four bands; more complex EQs offer greater flexibility

Product Video

Key Features

Module Type Discrete 4-Band Equalizer
Channels 2
Controls 7 selectable center frequencies per band, shelf/peak switch, +/-12dB boost/cut
Compatible Format 500 Series
Weight 2.3 lbs

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Frequently Asked Questions

The 550b adds a fourth band and improved internal components while retaining the core sonic signature of the original, offering a more versatile and refined experience.
It's a fairly gradual shelf, not a steep one; it provides a subtle blending capability rather than a dramatic high or low frequency boost/cut.
While it can impart a bit of grit when pushed, the discrete design keeps noise levels remarkably low even when boosting significantly.

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