API's 529 Stereo Compressor Combines Unmistakable API Compression Technology with the Convenience and Technology of the 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. 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 SPECIFICATIONS Connections: API 500 Edge Connector - VPR Alliance Compliant Input Impedance: 80 kohms Output Impedance: 50 ohms Nominal Operating Level: +4 dBu Maximum Input Level: +26 dBu Maximum Output Level: +26 dBu Attack Times: less than 1 ms to 50 ms Release Times: 0.05 s to 4 s Compression Ratios: 1.5:1 to inf:1 Threshold Control Range: +10 dBu to -20 dBu Metering: Dual (Stereo) 10-LED VU meter (-15 VU to +18 VU) 10-LED Gain Reduction Meter (-23 dB to -1.5 dB) Frequency Response: +/- 0.25 dB, 20 Hz - 20 kHz Signal to Noise Ratio: 106 dB Power Requirements: +16 VDC @ 180 mA across 2 slots -16 VDC @ 180 mA across 2 slots Size: 3 x 5.25 x 7 inches / 76 x 133 x 178 mm Size (Boxed for Shipping): 11 x 7 x 7 inches / 279 x 178 x 178 mm Actual Weight: 2.4 lb / 1.09 kg Shipping Weight: 3.0 lb / 1.36 kg Manufacturer: Automated Processes IncModel: 529SKU: I607132-N-0-WHXXWe are Chuck Levin's Washington Music CenterSince 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.
