
API, 8301 Patuxent Range Road, Jessup, MD 20794 Tel: 301-776-7879www.apiaudio.com527 Compressor/LimiterOperator's ManualRevised 06-07-12
API 527 CompressorNEW: Feed-Forward CompressionIn a feed-forward compressor, the RMS detector normally gets its signalfrom a split of the input signa
API 527 CompressorKNEESoft Knee CompressionSOFT: Rounded response curve· Gradual onset of compression (fade-in up to the set ratio)· Similar to an “ov
API 527 CompressorTHRUSTRSOFTININTHRUSTThe 527 Compressor includes API’s patented THRUST®circuitthat can be switched in or out as needed. This places
API 527 CompressorTYPELINKKNEETHRUSTRMETERVUGRINNEWOLDHARDSOFTINININ/OUT SwitchIN: The In/OUT switch inserts or removes the 527from the audio path via
Input Impedance: High Level In 160K ohmsLow Level In: 80K ohmsOutput Impedance: High Level Out 85 ohmsLow Level Out: 50 ohmsNominal Operating Level: -
I n a c o n s t a n t e f f o r t t o i m p r o v e t h e s u b t l e d e t a i l s o f o u r p r o d u c t s , s o m e a m
Features• Feed-forward or feed-back compression• Hard or soft knee compression•PatentedTHRUST®switchforfrequencydependent side chain control• Continuo
The patented THRUST® function can be switched in and outvia the front panel as well, applying a high pass filter beforethe RMS detector circuit that p
API 527 CompressorCompressor ControlsThe 527 Compressor provides a comprehensive suite ofcontrols:· OUT: Output level adjust· THRESHOLD: The level at
API 527 CompressorOV010dBTUO00THRESH10-20740-3dBu-6.3.5122.531.5RELEASES151520ATTACKmS25THRESHOLDTHRESHOLD: Sets the level at which compression begins
API 527 CompressorRATIO: Sets the ratio of input vs. output levels for signals thatexceed the set THRESHOLD· Continuously variable between 1:1 and inf
API 527 CompressorVUGR-3-5-7OV0-10-1-20123-8-6-4-1.5-10-12-15-17-19-23METERING - Output LevelAn OUTput level meter is provided to indicate the 527’sou
TYPELINKKNEETHRUSTRMETERVUGRINNEWOLDHARDSOFTININLINKLINK: The LINK switch activates the DC control voltagesumming with other units.API 527 CompressorI
API 527 CompressorCOMPRESSION TYPEThe 527 Compressor can be set to operate in two circuittopologies:· OLD: Feed-Back topology: The RMS detectorreceive
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