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collapse expand iconDescription

The 529 Stereo Compressor combines the unmistakable sound of API's compression technology with the convenience and popularity of the API 500 Series format. Carefully designed to deliver a wide range of compression options, the 529 delivers warmth, clarity and punch, whether used for subtle adjustments or heavy compression effects. Based on the unprecedented success of the 2500, the 529 takes many of the features and controls from API's famous stereo compressor and puts them into the first dual-slot 500 series module from API.

This stereo compressor features API's patented THRUST circuitry for a punchy low end, along with an Old/New switch that lets you choose between classic and modern compression characteristics: Old for vintage-style feedback compression and New for today's more common feed-forward compression. The Auto-makeup Gain button lets you adjust ratio and threshold controls without affecting the output level. Using API's discrete op-amps and transformer technology, the 529 delivers the legendary analog sound of API.
Open Box API 529 Stereo Compressor Level 2 197881316068
Open Box API 529 Stereo Compressor Level 2 197881316068

collapse expand iconFeatures

  • Continuously variable detented Gain, Threshold, Attack, Ratio and Release controls
  • 10-segment LED meters show Gain Reduction and selectable Input or Output Level
  • Over Threshold LED
  • Patented THRUST Switch for frequency dependent side chain control
  • Three selectable compressor curve Knee settings
  • Selectable New or Old switch for feed-forward or feed-back operation
  • Selectable variable or auto compressor make-up gain
  • Three-way In/Out including full hard relay bypass
  • Audio circuit uses 2520 and 2510 Discrete Op-Amps with transformer output

collapse expand iconSpecs

  • Connections: API 500 Edge Connector - VPR Alliance Compliant
  • Input impedance: 80 kohm
  • Output impedance: 50 ohm
  • Nominal operating level: +4dBu
  • Maximum input level: +26dBu
  • Maximum output level: +26dBu
  • Attack times: < 1ms to 50ms
  • Release times: 0.05s to 4s
  • Compression ratios: 1.5:1 to inf:1
  • Threshold control range: +10dBu to -20dBu
  • Metering: Dual (Stereo) 10-LED VU meter (-15VU to +18VU)
  • 10-LED Gain reduction meter (-23dB to -1.5dB)
  • Frequency response: +/- 0.25dB, 20Hz-20kHz
  • Signal-to-noise ratio: 106dB
  • Power requirements: +16VDC @ 180mA across 2 slots, -16VDC at 180mA across 2 slots
  • Conforms to Automated Processes, Inc. VPR Alliance size and connectorization layout specifications
  • This unit is made to install into the 500 Series frame VPR rack, lunchbox or any API console with 500 series slots. This is a dual-channel model which uses TWO adjacent 500 slots.
  • Dimensions (LxWxH): 3" x 5.25" x 7"
  • Weight: 2.4 lb.

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