FG-401

The FG-401 started as a recreation of the classic British console channel compressor, but morphed into quite a lot more. First, we gave it variable attack and release with increased range, adding more tonal options.

We then added an optimal transformer in/out, and not just any transformer—the famous British Class A Console transformer! This adds a beautiful warmth and sheen to the compressor.

Finally, we added an entirely unique second circuit path that provides an additional layer of smooth, rich tone. The FG-401 is perhaps the most versatile mix compressor in the world, and will sound good on any source you feed into it!

GR Meter

Displays the amount of compression in dB.

Threshold

Sets the point at which compression will occur after an audio signal amplitude exceeds this set level.

Ratio

The Ratio Knob adjusts the slope of the compression curve.

Attack

Controls the speed at which compression occurs after the signal has exceeded the threshold value. Turn to the left for a fast attack, and to the right for a slow attack.

Release

Controls the speed at which compression stops, once the signal has fallen below the threshold value. Turn to the left for a fast release, and to the right for a slow release.

Make-Up

The Make-Up Gain parameter allows for adjusting the output level; to compensate for level reduction as a result of compression. Its range is from -24dB to +24dB.

Mix

Controls the blend between the compressed and uncompressed signals, which is very useful to achieve parallel compression without any additional routing

Transformer

The Transformer Switch toggles the Transformer enablement.

Circuit

Toggles the FG-401’s processing between two circuits:

• Circuit 1 is punchier and more dynamic.
• Circuit 2 is more transparent and gives more space to the bass.

External Side-Chain

The FG-401 compressor has an adjustable Threshold which, when turned counter-clockwise, will increase the compression. When using the External Side-Chain, this is still the case, but you can also increase the compression by increasing the External Side-Chain Gain. Either decreasing the threshold or increasing the Side-Chain Gain will have the same effect on the compression.