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Just perfect, aesthetically and functionally.

Great range of compressions, from super fast and violent to smooth. Every parameter under full control, including knee and compression circuit.

Original box and original inspection card, see pics!



The API 527 takes it’s place alongside the family of API VCA based compressors, the 225L and the 2500 Stereo Bus Compressor. Anyone familiar with those units will immediately be at home with the API 527.

Features common to the line like “feed forward” (NEW) and “feed back” (OLD) gain reduction methods selectable on the front panel, provide a choice of “that old way”, or “the new way” of compression, for the highest level of flexibility in signal gain control. The “old way” or Feed-Back method is what most of the classic compressors used for the gain control circuit. The “new way” gain reduction is more typical of the newer VCA type compressors that rely on RMS detectors for the gain control voltage.

There is a “SOFT”/”HARD” switch for an “over-easy” type compression resulting in a very natural, uncompressed sound or a typical sharp knee type that lends itself to a much more severe limiting effect.

The Threshold control sets the initial operating parameter. The API 527 can be operated with signal input levels from +10 dBu to -20 dBu.