ALTAIR prides itself on being one of the manufacturers with the longest longevity in the professional audio industry. Proof of this are our high quality analog signal processors based on VCA technology: CN-220 and NG-440.

The highest audio quality and precision, with the analog flavor that several engineers generations fell in love with.


"CN-220" Compressor




ALTAIR CN-220 is a smooth sounding stereo-dual compressor/ limiter wich also incorporates a dual full-featured noise gate. A handy tool that has over the decades become a classic for engineers worldwide, discover why...

Noise-gate section equiped with dedicated filters. Test monitoring of the filtered signal to know exactly what will open the gate. Undesired background noises are easily removed without signal degradation, improving level control and mixing operation while front panel attack and release parameters allow optimal sound reconstruction.

Zoom canal CN 220

The CN-220 features an impressive + 24 dBu (max) input/output level operation and extremely low output noise. As an additional feature, the unit includes a band compressor mode with adjustable frequency to achieve a wide variety of effects (de-essing, vocal stopping, drum levelling, etc...). Electric bass guitar sounds, for example, become more natural as the harmonic contents are unaltered when "Slap Bass" playing.

Due to these complete features and excellent technical specifications the ALTAIR CN-220 has become a classic in professional audio, going a step further in dynamic processing.


  • Dual/stereo compressor + noise gate + band compressor
  • Large gate activity indicators and gain reduction bargraphs
  • Wide angle 12 LEDs output level indicators
  • State of the art VCA's for superb,no compromise sound transparency
  • HPF & LPF side chain filters/monitor switches for precise gating
  • Program dependent automatic compression time constants
  • Ah four sections incorporate By-pass switches for ease of operation
  • Balanced inputs/outputs by XLR and 1/4 jacks
  • Universal power supply voltage selection


"NG-440" Noise Gate

Noise Gates

Crystal Gating

ALTAIR NG-440 incorporates four identical full-featured noise gate sections. These 4 sections can be used as 4 independent MONO noise-gates, 2 x STEREO noise gate or a combination of the previous 2 modes. Both open-close transition and background noises in SHUT state are optimised to guarantee a transparent click-free operation for high end professional audio applications.

When used in STEREO mode, threshold, timing and gain reduction parameters will be controled just from one channel (L), actuating simultaneously over the 2 channels (L & R). Dedicated filters are provided to adjust triggering of the gate only by the desired instrument.Test monitoring of the filtered signals is available for easier adjust. Front panel attack and release time parameters are included for optimal sound reconstruction or for creative use. Background stage noises are easily removed for easier mixing operation. Spatial image of the sounds becomes more noticeable. Applications include sound reinforcement, drum or vocal gating, studio mic processing, etc.


  • Four noise gate sections for operation as quad/dual-stereo or mixed modes
  • Large gate activity LEDs and gain reduction bargraphs
  • State of the art VCA's for superb, no compromise sound transparency
  • HPF & LPF side chain filters/monitor switches for precise gating
  • Fast and automatic attack times selection
  • Ah four sections incorporate By-pass switches for easy operation
  • Balanced inputs/outputs by XLR and ¼ jaeks
  • Universal power supply voltage selection

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