D.W. Fearn VT-4 Vacuum Tube LC Equalizer 19
4 .
O P E R A T I O N
The use of most controls on the VT-4 Equalizer is self-explanatory. One feature
to note is that controls may be used in any combination. For example, use of both the
Low Cut and Low Boost controls at the same time can result in some extraordinary
effects. This also applies to the High Boost and High Cut.
The Mid-Cut control has a relatively low Q at minimal sttenuation settings.
Thus, the band covered is quite broad. As the Mid Cut control is advanced, the Q
becomes sharper and effects the selected frequency more narrowly. Low attenuation
settings (-2 to -6) are effective for removing some of the “mid-range muddle” than can
degrade a recording. The higher settings are useful to null-out an annoying resonance.
The High Cut control is useful for reducing noise. The highest frequency setting
(28 kHz) is particulary useful for digital recording. Attenuation in this range may help
avoid effects common with anti-aliasing filters in A-D converters.
The Input control allows processing of a wide range of input levels. Also,
extreme amounts of boost could overload the input of the device being feed by the VT-
4. Reducing the Input control setting may be helpful in this circumstance. It also
allows the overall output level of the VT-4 to be reduced to provide a better level to the
recorder. Settings above the “0” position are useful when processing signals from semi-
pro gear that typically have a lower output level.
Like all recording gear, there is no right or wrong when using the VT-4. Use
your ears and select settings that achieve your sonic goal. But avoid boosting frequen-
cies when there is no effect (such as boosting the extreme highs on a bass guitar), since
doing so may only increase noise.
