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576 Blue Stripe

Rev A FET Compressor

576 Blue Stripe is a modern reissue of the classic FET compressor inspired by the legendary 1176 Revision A. Built around the same high-quality input transformer and a pure Class A output stage, it delivers fast, aggressive compression with rich harmonic character. Featuring an ultra-fast 20 µs attack time, multiple ratio options including a musical 2:1 mode, and an explosive SLAM mode, the 576 Blue Stripe covers everything from subtle dynamic control to extreme peak limiting. Designed for versatility and impact, it excels on vocals, drums, and dynamic instruments across modern and vintage workflows.
Overview
Videos
Specifications
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Resources

Classic FET Compression, Reimagined
576 Blue Stripe draws direct inspiration from the revered 1176 Revision A, known for its speed, attitude, and unmistakable sonic signature. The design retains the core FET compression topology that defined countless recordings of the 1970s.

Transformer Input and Class A Output
At its front end, the compressor uses the same style of high-quality input transformer responsible for the original’s warmth and harmonic density. A pure Class A output stage ensures clarity, punch, and headroom throughout the signal path.

Ultra-Fast Transient Control
With an attack time of just 20 microseconds, the 576 Blue Stripe captures and shapes transients with surgical precision. This makes it ideal for taming aggressive peaks while preserving energy and immediacy.

Six Compression Modes for Total Control
Six ratio settings provide exceptional flexibility, from gentle 2:1 compression to hard limiting at 20:1. The SLAM mode recreates the iconic “all-buttons-in” behavior, delivering explosive dynamics, saturation, and unmistakable character.

Built for Character and Versatility
Equally effective on vocals, drums, and bus processing, the 576 Blue Stripe balances vintage tone with modern functionality, offering relay-controlled bypass and expanded control options for contemporary production environments.

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
Packing box
Shipping weight
1kg

Downloads

576 Blue Stripe Manual

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Products
Brands
500 Series Atas Audio

500 Series

500 Series Chassis

500-Series Chassis

Dynamics Atas Audio

Dynamics

Equalizers Atas Audio

Equalizers

Monitor Controllers Atas Audio

Monitor Controllers

Noise Gates Atas Audio

Noise Gates

Preamplifiers Atas Audio

Preamplifiers

Signal Distribution Atas Audio

Signal Distribution

Studio Monitors Atas Audio

Studio Monitors

Channel Strips

Channel Strips

Saturation

Saturation

MPE Keyboards Atas Audio

MPE Keyboards

Mid Side Processing

Mid-Side Processing

Reverb Atas Audio

Analog Reverb

Drawmer

Telegrapher

Garbage Ideas

Z&H Designs

Mesanovic

IGS Audio

Expressive E

Looptrotter

HLabs