Up for sale today is A VERY SPECIAL Undertone Audio Unfairchild Model 670M II formerly owned and operated by ERIC VALENTINE & Barefoot Studios + UNFa-1 Accessory Unit.

This isn’t just a 670M II, it is one of a few special Pilot Versions made and in use at the former Barefoot Studios in California by Producer and Undertone Audio creator Eric Valentine!

Also included is an MINT UTA Undertone Audio UNFa-1 Accessory for a complete combo.

Pick up is preferred but I will ship upon request. Depending on your location I may be able to deliver for a cost.

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Undertone Audio UnFairchild 670M II

Classic

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.

Flexible

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.

UTA Undertone Audio UNFa-1 Accessory

UnFairchild...Extended

The UNFa-1 Accessory Box is an add-on to the UnFairchild 670M II vari-mu tube compressor/limiter. It adds a whole new world of flexibility and function to the already versatile recreation of the Fairchild circuit. There were certain features that didn’t make sense to have included in the UnFairchild design because it would have strayed too far from the mission of faithfully recreating the original Fairchild circuit. Being outside the boundaries of the original Fairchild circuit doesn’t make these new features any less desirable. An optional add on product was and is the perfect solution. With these added features, UnFairchild users can have an authentic hardware recreation of the legendary vintage musicality of an original Fairchild WITH a level of control and flexibility that many plugins don’t even offer. It is truly unfair.

Added Features

• Wet/Dry Mix (for parallel compression)
• Feedforward/Feedback Mix
• HP Filtering for Sidechain
• Output Gain Control
• Feedforward Compression in M/S modes
• Averaged Stereo Linking
• Included harness for easy plug and play
• All done with high voltage Class A audio circuits to preserve sonic integrity