Audiffex U73b Compressor  

Item #: 
1500000000009478
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The U73b was commonly used for mastering between 1960 and 1980. It is an all tube vary-mu compressor/limiter with adjustable release time option. The developers at Audiffex kept the circuit exactly as... Read More

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Overview

The U73b was commonly used for mastering between 1960 and 1980. It is an all tube vary-mu compressor/limiter with adjustable release time option. The developers at Audiffex kept the circuit exactly as it was originally designed and only added input and output gain (before and right after compressor circuit) to help with proper adjustment of the compression. The plug-in effect has also been supplemented with a VU meter and selectable side-chaining.

The compressor`s controls are very easy, but the effect of this unique device is audible at the same moment you turn it on:

Compressor/Limiter switch
This is the upper U73b knob and it switches between Compressor mode (Kompr), Bypass (Durchschalt) and Limiter mode (Begr). The compressor mode has lower threshold setting and very gentle increasing ratio, in opposite, the limiter mode provides higher threshold setting with higher ratio but still with smooth knee.

Release time
The first three positions offer fixed release time, the other three positions (marked red) provide adjustable program content dependent release time option.

IN – adjust input gain before the compressor/limiter circuit

OUT – adjust output gain after the compressor/limiter circuit.

Sidechain – selects the signal source used for controlling the gain reduction.

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