{"id":10005926221,"title":"API 525 Compressor","handle":"api-525-compressor","description":"\u003ch1 id=\"reader-title\"\u003eAPI: 525 Compressor\u003c\/h1\u003e\n\u003cp class=\"article_h2\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExact reissue of API's original 525 from the early 70's\u003c\/li\u003e\n\u003cli\u003ePeak detecting \"feedback\" compressor\/limiter\u003c\/li\u003e\n\u003cli\u003eVariable Threshold and Output levels\u003c\/li\u003e\n\u003cli\u003eUnique \"Ceiling\" control combines key functions\u003c\/li\u003e\n\u003cli\u003eAnalog VU meter for monitoring gain reduction\u003c\/li\u003e\n\u003cli\u003e4 Switchable release modes\u003c\/li\u003e\n\u003cli\u003eDe-Ess function\u003c\/li\u003e\n\u003cli\u003eTraditional API fully discrete circuit design\u003c\/li\u003e\n\u003cli\u003eActive Balanced Input\/Output\u003c\/li\u003e\n\u003cli\u003eHardwire bypass\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOriginally 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, \u0026amp; 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.\u003c\/p\u003e\n\u003cp\u003eRelease 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 30 K Ohms, Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e100 Ohms, Transformer coupled, Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Levels:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e-15 dBu to +20 dBu\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Gain Reduction:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e25 dB\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eNoise:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e98 dB below +10 dBu output, at 10 dB of Compression\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eHarmonic Distortion:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0.5% Max, 30 to 20 kHz\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAttack Time:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e15 micro seconds\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRelease Times:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e.1, .5, 2.0, 2.5 seconds\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eDe-essing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eInversion of the Voice Energy Curve\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSlopes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eCompression, 2:1, Limit, 20:1\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMetering:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eCompression or Limiting-Illuminated Analog dB meter,\u003cbr\u003e shows Gain Reduction\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e±.5 dB, 30 to 20 kHz\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e±12\/18 Volts\/DC, @80 ma.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSize:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1.5\" X 5.25\" X 7.5\" Deep\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSize (Boxed for Shipping):\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e4.5\" X 6.5\" X 10\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eActual Weight:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1.77 lbs.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2.17 lbs.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","published_at":"2017-05-15T15:29:25+02:00","created_at":"2017-05-15T15:30:50+02:00","vendor":"API","type":"Compressors","tags":["500 Series Dynamics","500 Series Processors","API","Price Range_$1000 to $1500","Shop by brand_API","Shop by category_500 Series","Shop by category_500 Series Dynamics","Studio \u0026 Recording"],"price":123025,"price_min":123025,"price_max":123025,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":37533118669,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"525","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"API 525 Compressor","public_title":null,"options":["Default Title"],"price":123025,"weight":800,"compare_at_price":null,"inventory_quantity":1,"inventory_management":null,"inventory_policy":"deny","barcode":""}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/api_525_5.jpg?v=1506766321","\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/sp1_525.jpg?v=1506766321","\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/sp2_525.jpg?v=1506766321"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/0292\/6125\/products\/api_525_5.jpg?v=1506766321","options":["Title"],"content":"\u003ch1 id=\"reader-title\"\u003eAPI: 525 Compressor\u003c\/h1\u003e\n\u003cp class=\"article_h2\"\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExact reissue of API's original 525 from the early 70's\u003c\/li\u003e\n\u003cli\u003ePeak detecting \"feedback\" compressor\/limiter\u003c\/li\u003e\n\u003cli\u003eVariable Threshold and Output levels\u003c\/li\u003e\n\u003cli\u003eUnique \"Ceiling\" control combines key functions\u003c\/li\u003e\n\u003cli\u003eAnalog VU meter for monitoring gain reduction\u003c\/li\u003e\n\u003cli\u003e4 Switchable release modes\u003c\/li\u003e\n\u003cli\u003eDe-Ess function\u003c\/li\u003e\n\u003cli\u003eTraditional API fully discrete circuit design\u003c\/li\u003e\n\u003cli\u003eActive Balanced Input\/Output\u003c\/li\u003e\n\u003cli\u003eHardwire bypass\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOriginally 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, \u0026amp; 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.\u003c\/p\u003e\n\u003cp\u003eRelease 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 30 K Ohms, Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e100 Ohms, Transformer coupled, Balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Levels:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e-15 dBu to +20 dBu\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Gain Reduction:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e25 dB\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eNoise:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e98 dB below +10 dBu output, at 10 dB of Compression\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eHarmonic Distortion:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0.5% Max, 30 to 20 kHz\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAttack Time:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e15 micro seconds\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRelease Times:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e.1, .5, 2.0, 2.5 seconds\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eDe-essing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eInversion of the Voice Energy Curve\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSlopes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eCompression, 2:1, Limit, 20:1\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMetering:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eCompression or Limiting-Illuminated Analog dB meter,\u003cbr\u003e shows Gain Reduction\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e±.5 dB, 30 to 20 kHz\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e±12\/18 Volts\/DC, @80 ma.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSize:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1.5\" X 5.25\" X 7.5\" Deep\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSize (Boxed for Shipping):\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e4.5\" X 6.5\" X 10\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eActual Weight:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e1.77 lbs.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2.17 lbs.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e"}

API 525 Compressor

Product Description
$1,230.25
Maximum quantity available reached.

API: 525 Compressor

Features

  • 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

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.

The 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.

 

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" Deep

Size (Boxed for Shipping):

4.5" X 6.5" X 10"

Actual Weight:

1.77 lbs.

Shipping Weight:

2.17 lbs.

 

Sku: 525
Vendor: API

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