Handbook for Sound Engineers

Consoles 913

spurious instability, but is not exactly the desired end
here.

While FET inputs are far less prone than bipolar
inputs to the intermodulation and direct demodulation
effects that cause RF interference to appear out of
nowhere, this fairly healthy brace of filtering may be
helpful to those living near a source of high-powered

very high frequencies, such as a group of television

transmitters.

25.13.4 Virtues of Grounding

Grounding paths for virtual-earth mixing, especially in

long mixers, are always the final arbiter on how far

Figure 25-87. Auxiliary group electronics.

Foldback "B" identicalpair for foldback "A"

Left

Right

Effect send

"A" output

+3 Identical for effect sends, C & D *Adjust in situ