IGS Audio 576 Blue Stripe

The 576 Blue Stripe is a revised version of the classic FET compressor.

What it is 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.

What it does 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.

SLAM Mode can definitely give a male or female rock vocal track an in-your-face sound that you can't get anywhere else.

DEVICE TYPE:

Fet Compressor : Yes

BASIC FEATURES:

Stereo Link : Yes, by jumper in the PSU.

INPUT & OUTPUT:

Input Impedance (balanced) : 2.4k, Carnhill transformer

Output Impedance (balanced) : 600 Ohm, Carnhill transformer

Audio transformers : Yes, Carnhill on input and output

LEVELS:

Operating Level : +4 dBu

Max input level : +20 dBu

Max output level : +22 dBu

Noise Level : -99 dBA

Max. gain : 36 dB

Max Gain Reduction : -20 dB

TIME CONSTANTS:

Ratio : 2:1, 4:1, 8:1, 12:1, 20:1, Slam (All in)

Attack : 20us - 800us

Release : 50ms - 1.1s

BANDWIDTH:

Frequency response : 8 Hz to 20 kHz, +/- 0.1dB

DISTORTION (@ 20 HZ - 20 KHZ):

THD+N : 0.014%

POWER:

Power consumption : 2.5W

PACKING BOX:

Shipping weight : 1kg