The Pre-Amp Section; Bright Switch - Marshall Amplification Valvestate 2000 AVT series Instructions Manual

Introduction (cont.)
DFX On board
At Marshall our aim is to create products that offer our fellow guitarists true inspiration in the
practice and performance of their art. When integrating DFX (Digital Effects) into the tonal topology
of AVT, the greatest care was taken to ensure that the highest level of signal integrity was
maintained. Through careful shaping and mixing of the 'wet' (processed) and 'dry' (unprocessed)
signals, we have ensured that the on board effects enhance your tone while adding none of the
nasty, artificial 'grain' often associated with DFX.
We are so proud and enthused by the end results of our labour that we feel fully justified in
hailing Advanced Valvestate Technology as a major breakthrough in hybrid guitar amplifier design.
We are convinced that you will derive as much pleasure from playing them as we did while
designing them. Enjoy!
AVT100 Front Panel Features
I. The Pre-amp Section
Your AVT100 combo amp boasts three
independent channels: Clean, Overdrive 1 and
Overdrive 2. The preamp section is where the
gain, tone and relative volume of these three
channels is determined.
1 Input Jack Socket
This is where you plug your guitar into the
amp. You must always use a screened
(shielded) guitar cable and never use an
unscreened (unshielded) speaker cable. Also,
this cable should be one of good quality. If you
are in any doubt regarding this, your Marshall
dealer will be more than happy to help and
advise you.
2 Clean Channel Selector Switch
This allows selection of the Clean channel
via the front panel.
3 Clean Channel Gain Control
This rotary control regulates the drive into
the two cascaded valve stages of the preamp.
Lower settings will give you a wide range of
well defined, warm clean tones.
At higher Gain settings you will pass
through natural, valve-induced compression
and into an increased level of desirable 'break-
up' (a.k.a. 'crunch') which is perfect for subtly
overdriven blues/rock.
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Bright Switch

Most of the Gain controls in classic
Marshall amps have been fitted with what is
known as a 'treble bleed capacitor'. This
device allows extra high frequencies to be
'bled' through to the drive section when the
Gain control is at low settings. Engaging the
Bright Switch will 'bleed' extra high frequencies
into the drive stage of the Clean channel,
giving you a bright, clean tone perfect for many
styles, including funk and country.
The higher the Gain control is set, the less
effect the 'treble bleed capacitor' has. As a
result, at maximum Gain settings, the bright
switch will have no audible effect at all.
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