New 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.
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.
- 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
Connector: API 500 Edge Connector - VPR Alliance Compliant
Input Impedance: 60K Ohms, Balanced
Output Impedance: 75 Ohms, Transformer coupled, Balanced
Maximum Input Level: +27 dBu
Maximum Output Level: +28 dBu
Attack Time: 15 micro seconds
Release Time: 0.1, 0.5, 2.0, 2.5 seconds
Slopes: Compression 2:1, Limit 20:1
Maximum Gain Reduction: 25 dB
Metering: Illuminated Analog Gain Reduction dB meter
Frequency Response: ±0.5 dB, 20 Hz to 40 kHz
Signal to Noise Ratio: 112 dB
Power Consumption: 3 Watts - VPR Alliance Compliant
Unit Size: 1.5" X 5.25" X 7"
Shipping Size: 4.5" X 6.5" X 10"
Unit Weight: 1.8 lbs.
Shipping Weight: 2.2 lbs.
API 525 Manual
