Avid’s no-compromise replica captures every detail of the Fairchild 670. The Fairchild 670 is a dual-channel unit and, as such, is only available on stereo tracks.
Note that the companion Fairchild 660 also supports stereo operation. Both a Fairchild 660 and a Fairchild 670 were modeled from scratch using two different hardware units. This gives you a choice of two different-sounding Fairchild units to try on your stereo tracks!
The Fairchild 670’s internal design is similar to the Fairchild 660. However, the Fairchild 670 offers two channels of compression instead of one. Combined with the AGC control, this gives you even more compression options on stereo tracks.