The Fairchild Tube Limiter Collection benefits from more than 10 years of UA’s evolving sophistication designing plug-ins, plus the additional processing power afforded by the UAD-2 over the original UAD-1. While our original Fairchild plug-in's compression behavior remains an excellent rendition of the hardware, the new Fairchild Tube Limiter Collection plug-ins benefit from improved complexity with the tube amplifier and gain reduction nonlinearities (distortions) and updated time constant behaviors. Hands down, these are the most musical and authentic Fairchild plug-in emulations ever created.
Besides their obvious mono and stereo differences, the Fairchild 670 and 660 models offer variations in Threshold and DC Threshold behaviors, total gain, input attenuation range, distortion amount and structure, program dependence, time constant subtleties, and more. This provides an expanded palette within the Fairchild sound — just like a professional studio might have with various hardware units on hand. The 660 may be handy with mono sources, or when less control is required. Both plug-ins work as mono or stereo plug-ins.
The target unit was indeed the same Ocean Way Recording Fairchild unit #505 we originally modeled in 2004. The unit’s gain reduction components were carefully re-tubed and re-capped with period accurate NOS components to get it as close as possible to its original from-the-factory behavior.
The Legacy 670 plug-in’s Input Gain parameter was tuned to have maximum control over Threshold by adding a lot of additional gain to the Input (around 15 dB more gain than the hardware). The new 670 remains faithful to the exact gain range and amplifier behaviors of the original hardware. The new 660 and 670 are calibrated to -16 dBFS. The Headroom (HR) control will allow the user the get similar compression amounts as the 670 Legacy version and beyond, and makes setting a higher ratio with DC Threshold much easier. Conversely, Headroom settings can be increased to make mastering applications a breeze. Counter clockwise Headroom selections increase headroom and therefore raise the gain reduction threshold and lower distortion behaviors. Clockwise selections decrease headroom, therefore lowering the gain reduction threshold and raising distortion behaviors.
No, the original Fairchild 670 Legacy plug-in will be included in the UAD collection of plug-ins. The original Fairchild 670 plug-in remains useful, in that it consumes less DSP, and is less sonically “colored” — which may be desirable in some instances.
For UAD customers who do not already own the Fairchild 670 Legacy plug-in, they will get it as a third plug-in title with the purchase of the new Fairchild Tube Limiter Collection.