Api Audio 525 Mono Compressor

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Api Audio 525 Mono Compressor


Api Audio 525 Mono Compressor
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. 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
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Api Audio

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