Studio Channel

API 550b 4-band EQ rack, in 500 Series format. You will be surprised by the possibilities this equalizer offers you. One of the most compelling features of the 550B is its ability to modify or invert tones.

ARTICLE N° 57384
  • API 550b 4-band modular equalizer, in 500 format.
  • Filter type: The "Low" and "High" bands are switchable Peak/Shelf.
  • Low filter frequencies: 30, 40, 50,100, 200, 300, 400Hz.
  • Low-Mid filter frequencies: 75, 150, 180, 240, 500, 700, 1Khz.
  • Mid-High filter frequencies: 800,1.5K, 3K, 5K, 8K, 10K, 12.5K.
  • High filter frequencies: 2.5K, 5K, 7K, 10K, 12.5K, 15K, 20K.
  • Boost/Cut Filter: +/- 12dB.
  • Filter Slope: 12dB per octave.
  • Input Impedance: 18.5K +4 in, 7.5K -2 in.
  • Output Impedance: Less than 75 Ohms.
  • Nominal Levels: -15 to +15 dBu.
  • Clipping Level: +30 dBu at +/-16 V.
  • Frequency Response: +0, -. 3.30 to 20 kHz.
  • Noise: Real, non-noisy noise, <-98 dBu, 20-20 kHz.
  • Distortion: 0.07% max, at +18 dBu Output.
  • Connectors: 15 positions.
Based on the original API 550 from the late 1960s, the API 550b is a worthy successor to the EQ that played a major role in the history of music recording, but with an additional filter band and several new frequencies.

The benefits of the API 550B will be most apparent to those who use EQ extensively. The API 550b will be a valuable asset to your ever-evolving studio needs. It’s also built tough with a sound you’ll never stop developing, designed to be your sonic partner year after year.

Incorporating the legendary circuitry of the API 550, the API 550b 4-band EQ evokes that royal API lineage in every ounce of its sonic character. Skillfully blending past and present, the API 550B carries the torch of the now classic API 550EQ, delivering just the right amount of controls to solve problems and smooth out the sound.

On each of the API 550 b's bands, there are seven carefully selected switchable filter frequencies. You'll discover why top engineers rely on the API 550b on a daily basis.

Many equalizers today offer a huge assortment of complex functions, but the API 550B includes exactly the right amount of controls needed by the professional engineer, as seen by Sonovente.
Pre-amp
 No
Compressor
 No
Limiter
 No
The beauty of the entire API 500 Series is its long-term flexibility and lasting value, especially as needs change over time.