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API 550

API

The API 550b is a four-band analog EQ re-issuing the 1967 API 550 with an added band. It offers seven switchable frequency centres per band, ±12 dB boost/cut, shelf/peak switching on bands 1 and 4, Proportional Q, reciprocal and repeatable filtering, and a +30 dBu clipping level. It uses API’s 2520 op amp and is built to original blueprints.