Distribuidor de Audio Profesional
UnFairchild 670 MII

UTA UnderTone Audio

UnFairchild 670 MII

$9,995.00 USD


The Fairchild circuit could be one of the most coveted and time tested compressors of all time. It has proven its extraordinary universal musicality for over 5 decades on countless genres of music. The beauty of its design is in its simplicity. The audio path, primarily consisting of only 2 transformers and 4 paralleled vari-mu tubes, can provide a gentle smoothing of levels or an explosive, energizing compression that will make any recording leap out of the speakers. The UTA UnFairchild is a painstaking recreation of the classic sound of this circuit.
There are a few limitations of the original Fairchild that we set out to address. First, we have made careful adjustments to the circuitry that greatly improve the lifespan and reliability of the tubes. Additionally, we've added a whole host of exciting new features that have never before been available on a Fairchild. The UnFairchild sports 6 original preset Time Constants and 4 variable Time Constants (attack and release), MS function, side chain processing, a true bypass, fine adjustment of left/right balance, user adjustable "DC Threshold", and "Feed-Back" vs. "Feed-Forward" functionality. With the UnFairchild, we've made this extraordinary circuit flexible enough to handle pretty much every compression task on any style of music.


  • Input Impedance - 2.5KΩ
  • Output Impedance - 200Ω
  • Output Level - +4dB @ 0Vu (+28dBm clipping point)
  • Gain - 20dB(in 1dB steps)
  • Frequency Response - 20hz - 20Khz (+0/-.5dB)
  • Noise Level - -83dB
  • Harmonic Distortion - Better 1% at +18dB

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