527A Compressor/Limiter
500 Series Module
From API:
The API 527A Compressor/Limiter takes its place alongside the family of API VCA based compressors, including the 225L compressor and 529, 2500, and 2500+ stereo bus compressors. Anyone familiar with these units will immediately be at home with the 527A.
Features common to the line include “feed forward” (NEW) and “feed-back” (OLD) gain reduction methods selectable on the front panel, provide a choice of “that old way” or “the new way” of compression, for the highest level of flexibility in signal gain control. The “old way” or feed-back method is what most of the classic compressors used for the gain control circuit. The “new way” gain reduction is more typical of the newer VCA type compressors that rely on RMS detectors for the gain control voltage.
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.
Specs
- Connector
- API 500 Edge Connector – VPR Alliance Compliant
- Input impedance
- 120 K Ohms, Balanced
- Output impedance
- 75 Ohms, Transformer coupled, Balanced
- Maximum input level
- +26 dBu
- Maximum output level
- + 30dBu
- Output fader control gain
- -Infinity to +10 dB
- Attack times
- 1 millisecond to 25 milliseconds
- Release times
- 0.3 seconds to 3 seconds
- Compression ratios
- 1:1 to 1:Infinity
- Threshold control range
- +10 dBu to -20 dBu
- Metering
- 10 Segment LED Meter showing either Gain Reduction (-1 to -24 dB) or Output Level (14 to +14 dBu). Overload LED: +21 dBu
- Frequency response
- +/- 0.5 dB 20 Hz to 40 kHz
- Signal to noise
- 110 dB
- Power requirements
- 3.5 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.
Source: API 527A Compressor/Limiter product page