API Audio 525 Discrete Compressor


API Audio 525 Discrete Compressor

A Reissue of a 1970s Classic!

With the API 525, you get to snag the sound of API’s famous 525 — a modular compressor originally introduced in the 1970s. This compressor reissue is a “feedback” type of compressor, for classic sonic character and exceptional dynamics control behavior. Onboard the API 525, the cool multi-function “ceiling” control can lower threshold while raising output level to match, so you can adjust dynamics without changing level. As part of API’s modular 500 Series, you’ll enjoy classic-but-versatile character in a flexible and reasonably priced design, with the API 525.

API 525 500 Series Modular Compressor:

  • Reissue of a 1970s classic
  • API’s 500 Series: Long-term flexibility, lasting value

Product Description

API 525 500 Series Modular Compressor Features:

  • Reissue of API’s original 525 from the early 70’s
  • Peak detecting “feedback” compressor/limiter
  • Variable Threshold and Output levels
  • Unique “Ceiling” control combines key functions
  • VU meter for monitoring gain reduction
  • 4 Switchable release modes
  • De-ess function
  • Traditional API fully discrete circuit design
  • Hardwire bypass

API 525 500 Series Modular Compressor Specifications:

  • Input Impedance: > 30 K Ohms, Balanced
  • Output Impedance: 100 Ohms, Transformer coupled, Balanced
  • Operating Levels: -15dBu to +20dBu
  • Maximum Gain Reduction: 25dB
  • Noise: 98 dB below +10dBu output, at 10dB of Compression
  • Harmonic Distortion: 0.5% Max, 30Hz to 20kHz
  • Attack Time: 15 micro seconds
  • Release Times: .1, .5, 2.0, 2.5 seconds
  • De-essing: Inversion of the Voice Energy Curve
  • Slopes: Compression, 2:1, Limit, 20:1
  • Metering: Compression or Limiting-Illuminated Analog dB meter, shows Gain Reduction
  • Frequency Response: +/- .5 dB, 30 to 20 kHz
  • Power Requirements: +/- 12/18 Volts/DC, at 80 ma.

Additional Information