API 527A - Compressor / Limiter - 500-Series Module

API 527A - Compressor / Limiter - 500-Series Module

The API 527A is mono VCA based compressor limiter designed in the 500 series format. The 527A features selectable feedforward and fee-back gain reduction methods allowing users to have the highest level of flexibility in signal gain control.

There is a "SOFT"/"HARD" knee switch for an "over-easy" type compression resulting in a very natural, uncompressed sound or a typical sharp knee type that lends itself to a much more severe limiting effect.

The patented THRUST® function can be switched in and out via the front panel as well, applying a filter before the RMS detector circuit that preserves that punchy bottom end.

Two or more 527A Compressor/Limiters can be linked together via a DC link allowing multiple units to be combined for stereo and multichannel applications.

The output level remains fairly constant regardless of the threshold or ratio control, much like the "more/less" Ceiling control on the API 525 Compressor. This allows for live adjustments without any noticeable gain changes in the program level.

The 527A Compressor/Limiter makes use of the 2510 and 2520 discrete op-amps and exhibits the reliability, long life, and signature sound which are characteristic of API products.

Features

• Feed-forward or feed-back compression
• Hard or soft knee compression
• Patented THRUST® switch for frequency-dependent sidechain control
• Continuously variable, 31 position detented THRESHOLD control
• Continuously variable, 31 position detented RATIO control
• Continuously variable, 31 position detented ATTACK and RELEASE controls
• Continuously variable, 31 position detented OUT (output) level control
• 10-segment gain reduction/VU meter (GR/Output)
• Overload LED
• IN switch with soft and hard relay bypass
• Audio circuit uses the 2510 and 2520 discrete op-amps