API Audio 529

Stereo Compressor

SKU: API00014 Categories: , , , Tag:



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
3 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

The new 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. The 529 is backed by API’s unique 5 year warranty.


Size: 3″ X 5.25″ X 7″
Size (Boxed for Shipping): 11″ X 7″ X 7″
Actual Weight: 2.4 lbs.
Shipping Weight: 3.0 lbs.

Additional information

Weight 3 lbs
Dimensions 6 × 7 × 3 in