API 525A

The API 525A is a feedback-type compressor/limiter that delivers vintage sonic character and exceptional dynamics control behavior that is distinctly different from modern VCA feed-forward compressors. Basic operational parameters are quick to set up using its In (threshold) and Out (make-up gain) controls. The unique Ceiling control lets you modify the threshold while simultaneously boosting or lowering makeup gain to compensate, so you can adjust dynamics on the fly without changing the output. Separate compression and limiting switches set the ratio for either 2:1 or 20:1, respectively. Attack times are adjustable from 15μs to 15ms; Auto release is adjustable from .05s to 2.0s.

Specifications:

• 500 Series module based on API's original 525 from the early1970s
• Additional Attack time control lets you fine tune the onset of compression
• Peak detecting feedback-type compressor/limiter
• Variable Threshold and Output levels
• Unique Ceiling control enable on the fly dynamics adjustments without change in output
• VU meter for monitoring gain reduction
• Switchable release modes
• Traditional API fully discrete circuit design
• Hardwire bypass