6.1 Equalization Primer
An equalizer is a group of tone controls that
allow adjustment to the frequency range of an
incoming signal using a number of separate
frequency bands. A graphic equalizer
consists of a number of pre-selected
frequency bands, boost/cut control, and a
pre-set bandwidth or “Q” control for each
frequency band. Each fader on a graphic
equalizer corresponds to a specific frequency
range to either cut or boost. The bandwidth
of the frequency range is preselected. The
mid bands are typically peak/dip while the
end bands are typically shelving filters.
A six-band graphic (program) equalizer as
found in the Vt-747sp consists of six
frequency selection controls: Low-bass, Mid-
bass, Low-mid, Mid, High-mid, and High.
Each frequency band has carefully selected
cut/boost, frequency range, and Q
parameters that are useful and effective to
shape and sweeten the signal. The Low
Bass, High Mid and High bands are shelving
filters while the Mid-bass, Low-Mid, and Mid
bands are peak/dip filters. For details on the
Vt-747sp graphic EQ parameters see
Chapter 3, Operation and Controls.
7.0 FAQs
The following are answers to Frequently
Asked Q
uestions about the Vt-747sp:
Q: Can I use the Vt-747sp as an insert for
compression and EQ?
A: Yes. the Vt-747sp is perfect as an insert for
a recorded stereo signal such as keyboards,
acoustic piano, drum overheads, acoustic
guitar, etc.
Q: What’s the main difference between the
Vt-747sp’s compressor and Avalon’s
AD2044 compressor?
A: The Vt-747sp is a dedicated stereo
compressor that is loaded with many different
tones and color. The Vt-747sp has vacuum
tubes, six-band program equalizer and built in
spectral control. The AD2044 is an ultra-high
performance pure Class A 100% discrete
traditional compressor. It features extreme
dynamic range, ultimate low noise and
completely transparent compression, great
for mastering, tracking and mixing.
Q: How often will I need to change the
tubes?
A: The vacuum tubes on the Vt-747sp are
military spec tubes rated for over 5,000 hours.
Avalon recommends changing the tubes
approximately every 2 years or so on a unit
that is used regularly. Avalon recommends
that you replace tubes with exact make and
model of the tubes that Avalon specifies. You
may purchase a spare set of tubes for your
Vt-747sp directly from Avalon.
Q: Can I damage the Vt-747sp by turning
the preamp gain up too high?
A: No. The Vt-747sp has enormous
headroom. Crank it up and check it out.
Page 27
Avalon Vt-747sp Operation Manual
FAQs
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