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API 525 Discrete Compressor, Re-Issue


  • Our Price
  • $1,230.25
  • Regular price MSRP: $1,295.00

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Get Everything You Need In A Compressor With The API 525 Discrete Compressor, Re-Issue

Originally released in the 70's, the API 525 is a feedback type compressor. An input (threshold) control and output (make-up gain) control are provided, along with an additional ceiling fine-tune function which can increase gain reduction (lower threshold) while simultaneously raising output level to match, so the user can alter dynamics on the fly without level changes. A compression/limit switch sets ratio at either 2:1 or 20:1. Attack time is as fast as 15u/s. Four auto release modes are offered via two switches, 0.1s, 0.5s, 1.5s, & 2.0s. A De-Ess function inserts an inverse vocal energy curve filter in the detector for effective sibilance/pop reduction. The 525 design has been taken from the original blue prints and spec control drawings from the API archives.

Release times vary with frequency, with high frequency / full bandwidth content released faster than lower frequencies for natural envelope tracking. Attack time is fixed, chosen to catch the fastest peaks, without pumping. Equally useful as a tracking, mixdown or program compressor/limiter, the 525 utilizes vintage dynamics control and an easy to use multi-function control set. The 525 has a hard-wire bypass switch, a balanced input, and a pinout that is the same as all the other 500 series modules. Two or more 525s can be linked for multi-channel compression. T

he API 525 Compressor makes use of the 2510 and 2520 op-amps and exhibits the reliability, long life, and uniformity which are characteristic of all API products.

  • Exact 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
  • Analog VU meter for monitoring gain reduction
  • 4 Switchable release modes
  • De-Ess function
  • Traditional API fully discrete circuit design
  • Active Balanced Input/Output
  • Hardwire bypass

SPECIFICATIONS

  • Input Impedance: > 30 K Ohms, Balanced
  • Output Impedance: 100 Ohms, Transformer coupled, Balanced
  • Operating Levels: -15 dBu to +20 dBu
  • Maximum Gain Reduction: 25 dB
  • Noise: 98 dB below +10 dBu output, at 10 dB of Compression
  • Harmonic Distortion: 0.5% Max, 30 to 20 kHz
  • 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, @80 ma.
  • Size: 1.5 X 5.25 X 7.5 inches
  • Size (Boxed for Shipping): 4.5 X 6.5 X 10 inches
  • Actual Weight: 1.77 lbs.
  • Shipping Weight: 2.17 lbs.

Manufacturer: Automated Processes Inc
Model: 525
Warranty: See manufacturer website for details
SKU: I302012-N-0-B

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