About This Listing

Mint Condition with 6 Month Alto Music Warranty

What does it do?

The API 550b is a continuation of the EQ that played a major role in the history of music recording, with newly added frequencies and filter bands.

What features does it have?

  • Four band EQ
  • Each band offers seven API selected frequency centers
  • Reciprocal and repeatable filtering
  • 12 dB of boost/cut per band
  • Shelf/Peak switching
  • "Proportional Q" narrows filter Q at extremes
  • Traditional API fully discrete circuit design
  • High headroom +30 dB clip level

Listed9 years ago
Condition
Brand
Model
  • 550B 500 Series 4-Band Equalizer Module
Categories
Made In
  • United States

About the Seller

Alto Music

Middletown, NY, United States
(122,183)
Joined Reverb:2014
Items Sold:214,866
Product Overview
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.
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