API 525A Mono Compressor - 500-Series Module Since the early 1970s and the subsequent re-issue over 20 years ago, the 525 Discrete Compressor has become one of the most trusted vintage-style compressors in the industry. Building on the powerful core circuitry of the original 525, the new API 525A maintains the discrete audio path and expands the feature set for even more applications in the modern studio. It artfully combines API’s proprietary transformers, 2510 and 2520 opamps, retaining the sonic characteristics of the original while exhibiting the reliability, long life, and uniformity which is characteristic of all API products. API 525A Features: NEW – Variable Attack adjustable from 15 microseconds to 15 milliseconds NEW – 7 selectable Release Modes (.05 to 2.0 Seconds) Unique Ceiling Control simultaneously combines Threshold and Make-up Gain Classic 1970s style analog gain reduction VU meter Traditional API discrete audio path circuit design Equipped with 2520 and 2510 opamps Proprietary API output transformer Balanced Input/Output Hardware Bypass
