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UnderTone Audio UnFairchild 670M II

A painstaking recreation of the classic sound of the legendary circuit
MFR# UnFairchild 670M II
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Product Description

The UnderTone Audio UnFairchild - Recreating A Beloved Compressor

Under the banner of UnderTone Audio, famed producer and engineer Eric Valentine (Smash Mouth, Good Charlotte, Queens of the Stone Age, Slash) has released an incredible new compressor, the UnFairchild. As an avid fan of the original Fairchild 670, a tool he has utilized on countless records, Valentine was looking to create a more affordable take on the classic unit that would still deliver its trademark sound. In the UnFairchild, UnderTone and Valentine have created a replica compressor that stays true to the characteristics of the original while also expanding the unit to be more flexible in the modern studio.

Breathing Life Into A Classic Compressor

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 UnderToneAudio UnFairchild is a painstaking recreation of the classic sound of this circuit.

A Fairchild With Flexibility

There are a few limitations of the original Fairchild that UnderTone set out to address. First, they have made careful adjustments to the circuitry that greatly improve the lifespan and reliability of the tubes. Additionally, they have 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, UnderTone made this extraordinary circuit flexible enough to handle pretty much every compression task on any style of music.

Product Specifications

Condition New

Product Reviews

5 out of 5 stars.
Review Count (6)

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FFS it smokes.

By yohami z on March 22, 2021

MOJO!!!

By Matthew N on November 19, 2020

I have many Manley, vintage Neve, Urei, Ua,Retro, etc etc.
This is my favorite compressor for mix buss or drums for rock music, hands down.

By Michael F on June 14, 2020

Effortless compression when you want it. Just seems to make everything sound “better”. Considering what the UnFairchild does to audio, the cost of an original, and the service and support from VK and UnderTone Audio I feel the price for this is completely justified.

By Peter L on October 24, 2019

Bought and use it.

By William on April 22, 2019

this thing is amazing!

By Chris M on February 12, 2019

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
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In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
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The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
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