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vmp Series
Front Panel
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The front panel contains all of the channel controls and the unbalanced
D.I. Input.
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The pad switch changes the amount of gain available from the valve,
which means more second order harmonics and soft clipping compression ('valve
warmth') when driven hard. Depending on input signal levels, it is often possible
to choose any of the Pad settings while keeping the output signal neither too high
nor too low for your recorder through the use of the output level. Using the Pad at
-30dB will give you a clean, transparent signal and a stronger bright/air EQ effect,
while increasing to -15dB and then 0dB pad will make your sound warmer and
possibly even distorted, with gradually less high EQ effect.
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The bright/air High Shelf EQ consists of two musically useful curves at
the extreme high end of the audio spectrum, with bright starting at around 2-4kHz
and air higher again. The frequencies effected are often above hearing ranges,
but affect spatial location. The High Shelf EQ comes before any active gain stage,
which means less noise. Remember that bright/air is interactive with the pad
control, more pad equals more High EQ.
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The deep/lo cut Low Shelf EQ can boost or cut the lower extremes of
the audio range, either cleaning up unnecessary low end noise and rumble or
boosting them for fat, solid sounds. These ultra low frequencies can be difficult to
control, with slow rise and fall times and a lot of power contained within the signal.
Careful attention has been paid to these frequencies, with plenty of headroom
allowed, which means fatter bass for you!
The phantom off/on switch provides +48V phantom power to the XLR
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input when required.
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Phase reverse can be used to allow for phase differences between
microphones when using multi mic techniques. If the combination of microphones
(e.g. top and bottom of snare) is sounding thin or weak, try reversing the phase.
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The output level controls the signal level from the valve to the discrete
Class A output buffer stage.
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