The API 525 is perhaps the most successful solid state feedback compressor in history. It delivers dynamics control behavior unlike VCA feed forward compressors so common today. A remarkable multi-function ceiling control can increase gain reduction while simultaneously raising output level to match, so the user can alter dynamics on the fly without level changes. This re-issue 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 just low frequency 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 benefits of the API 525 are most obvious to those who use compression on a regular basis. Vintage dynamics control, an easy-to-use multi-function control set and a wide range of 500 Series mounting options assure that the 525 will surpass your most critical applications. With the addition of a hard-wire bypass switch, a balanced input and a pinout that is the same as all the other 500 series modules, the 525 is still, after 25 years—"the sound." Two or more 525s can be linked for multi-channel compression.
The 525 feedback compressor/limiter makes use of the 2510 and 2520 op-amps and therefore exhibits the reliability, long life and uniformity which are characteristic of API products.
API 525 Classic Discrete Compressor Features
- Reissue of API's original 525 from the early 70s
- Peak detecting feedback compressor/limiter
- Variable threshold and output levels
- Unique ceiling control combines key functions
- VU meter for monitoring gain reduction
- Four switchable release modes
- De-ess function
- Traditional API fully discrete circuit design
- Hardwire bypass
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