The W91A equalizer is one of the later developed. It was designed in the early 1990´s when customers requested for more channels with full features. All circuitry for the W91A’s is high quality and build after the standards of the IRT (Institut für Rundfunk Technik). The idea behind the W91A equalizer was to build a balanced eq module in a small, half fader (B1) cassette. The W91A is quit flexible and a good alrounder featuring with selectable frequencies and a q-factor. You can use the the W91A for mixing and mastering. The W91A is a flexible eq with a relatively clean yet slightly aggressive character. It´s ability to go from subtle filtering to extreme EQ-ing effects, makes the W91A a very powerful tool. The sound is much more “in the face” and you can still add loads of high frequencies without getting any harshness. Punchy!
What’s in the library programs
- Original sampled library updated to Legacy spec.
- 3 sample rates: 44.1 - 48 - 96kHz
- Nebula4 and Nebula3 AlexB Legacy Skin
Spec.
- The feeling and character by a real top-class vintage eQualizer
- Low end Ripple and echo fixed, audio quality improved
- 3 Parametric bands
This program library works in licensed Nebula3 and Nebula4, NOT Nebula3 1.3.505 or N4-Player
Note for MAC users:
From Acustica Audio: "After several tests, we have detected that our products do not run correctly in the Rosetta 2 mode and we recommend using always application with a specific build for Silicon computers."
To use Legacy libraries on MAC computer you need to upgrade to Nebula 4.5 (rev. April 2022) also.

W91A eQ Demo
Download and try the program demoIt works with all Nebula3 and Nebula4 versions
Some restrictions are present compare to full commercial program.