The FET-type solution was first used for its application in the legendary UREI 1176 compressor from the 70s. The most important feature inspired by revision A is the input transformer used and pure class A output stage. The compressor is equipped with a relay bypass, 2:1 Ratio and Slam Mode accessible on the front panel.
The 576 BS’s major selling point is its ultra-fast attack time — 20 µS. The 576 BS Ratio buttons allow four different modes of operation: 2:1 Ratio (soft compression); 4:1 ratio (moderate compression); 8:1 ratio (severe compression); 12:1 ratio (mild limiting); 20:1 ratio (hard limiting); S – SLAM, All Buttons In trick mode.
DEVICE TYPE
• Fet Compressor: Yes
BASIC FEATURES
• Stereo Link: Yes, by jumper in the PSU.
INPUT & OUTPUT
• Audio transformers: Yes, IGS custom transformers
• Input Impedance (balanced): 2.4k, IGS Custom transformer
• Output Impedance (balanced): 600 Ohm, IGS custom transformer
LEVELS
• Operating Level: +4 dBu
• Max input level: +20 dBu
• Max output level: +22 dBu
• Max Gain Reduction: -20 dB
• Max. gain: 36 dB
• Noise Level: -99 dBA
TIME CONSTANTS
• Attack: 20us - 800us
• Release: 50ms - 1.1s
• Ratio: 2:1, 4:1, 8:1, 12:1, 20:1, Slam (All in)
BANDWIDTH
• Frequency response: 8 Hz to 20 kHz, +/- 0.1dB
DISTORTION (@ 20 HZ - 20 KHZ)
• THD+N: 0.014%
POWER
• Power consumption: 2.5W
