Presence (amplification)  From Wikipedia, the free encyclopedia
Jump to: navigation, search  In an amplifier, a presence control
boosts the upper mid-range frequencies to make the sounds of
voices and instruments with similar tonal ranges seem more
"present".[1]  On television production studio's sound desk,
there can be several presence controls, for several different,
switchable, frequencies.[2] There is a limit to the flexibility
of such controls, and they are sometimes insufficient. If the
degree of mis-match between microphones is great, simply
increasing presence is not enough, and instead a sound engineer
will use a graphic equalizer, sometimes several, each connected
to an individual sound channel.[3]  Presence controls can also
be found on electric guitar amplifiers. The first presence
control on a Fender amplifier, for example, appeared in 1954 on
the Twin. In 1955 it appeared on the 1/15 Pro-Amp, the 3/10
Bandmaster, the 2/10 Super,[4] and the 4/10 Bassman.[5] The
original Fender presence control a