Description
Engineers work around the Fairchild 670’s limitations because the sound justifies it, not because the design is convenient. Eric Valentine’s answer was to rebuild the machine: keep the variable-mu tube circuit, redesign everything around it. The UnFairchild 670M II hardware is the result, and the UTA-D plugin – developed with MixLand – models that hardware faithfully. If you have ever wished a Fairchild had a threshold control that made sense, time constants you could actually tune, and a detector that could run feed-forward, this is that wish granted.
MixMasterPlugins offers it at €59.99 instead of €149.00 – 60% off – with your own license key and a secure download link sent to your email.
Engineering the 670 for modern gain staging
The stock 670 assumes 1950s console levels; modern sessions do not live there. The UnFairchild’s user-adjustable DC Threshold bridges that gap, letting the unit interface with both vintage and modern gear. The four continuously variable time constants – added to the six originals – give you tuned release behavior instead of preset steps. The feed-back/feed-forward detector switch changes the compression character fundamentally: feed-back for the classic program-dependent glue, feed-forward for tighter, more modern control. Mid/side operation and sidechain processing make it a mastering-grade tool, and true bypass keeps your comparisons honest.
What’s inside the box
- Model of the UnFairchild 670M II hardware (Eric Valentine / UnderTone Audio), via MixLand
- Variable-mu tube circuit with 10 time constants (6 original + 4 variable)
- Adjustable DC Threshold, FB/FF detector, mid/side, sidechain, true bypass
- Software-only: makeup gain, wet/dry mix, THD adjustment – distortion separated from compression
- VST3, AU, AAX on Mac & Windows
official UnderTone Audio website
Distortion vs. compression, independently
The standout engineering capability is the THD control. On real tube hardware, driving the circuit harder changes both the compression and the harmonic content together. The plugin’s THD adjustment decouples them: add tube harmonics without additional gain reduction, or compress cleanly while keeping the color subtle. Combined with wet/dry mix, this makes the UnFairchild a precision instrument – parallel tube saturation on a vocal, gentle bus glue with independent color control, drum crush with the transients preserved underneath.
Tech specs at a glance
- Formats: VST3, AU, AAX (64-bit) – Mac & Windows
- Mid/side, sidechain, true bypass
- Internet needed for delivery and authorization
Why engineers buy from MixMasterPlugins
MixMasterPlugins is built for people who finish records. You get hassle-free setup with clear installation steps, fast email delivery of your download link and license key, and support that speaks your language. Deals like this 60% discount on the UnFairchild 670M mkII are exactly what the store is for – check the shop for more, or dig into the Mix & Master Plugins category for dynamics tools that finish your mix.
Frequently asked questions
What do I actually get when I buy the UnFairchild 670M mkII here?
The complete plugin, your own license key, and a download link sent to your email – the same full product, at 60% off.
How does it compare to stock-670 emulations?
It models rebuilt hardware with a different control set and behavior – it does not sound like a stock 670, by design.
Can it do parallel compression internally?
Yes – the wet/dry mix control blends processed and dry signals without extra routing.
Mac and Windows?
Both, via VST3, AU and AAX.
Delivery?
By email, typically within minutes of checkout.
A Fairchild rebuilt for the way we actually mix. At 60% off, it is a serious tool at an unserious price.
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