API 527A er endnu en i den berømte række af VCA-baserede kompressorer fra API, herunder 225L, 529 og 2500 og 2500+ stereo bus kompressorer. Alle, der kender en af disse enheder, vil med det samme føle sig tilpas med 527A.
- Feed-forward or feed-back compression
- Hard or soft knee compression
- Patented THRUST® switch for frequency-dependent sidechain control
- Continuously variable, 31 position detented THRESHOLD control
- Continuously variable, 31 position detented RATIO control
- Continuously variable, 31 position detented ATTACK and RELEASE controls
- Continuously variable, 31 position detented OUT (output) level control
- 10-segment gain reduction/VU meter (GR/Output)
- Overload LED
- IN switch with soft and hard relay bypass
- Audio circuit uses the 2510 and 2520 discrete op-amps