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7
AVT50 1x12" Combo & AVT50H Head Front Panel Features
7 Overdrive Volume Control
As its name suggests, this control
determines how loud your AVT50’s Overdrive
channel will be. The volume setting you
choose will be dependent on both how loud
you actually want to be, and also what type of
sound you have set up on the preamp, i.e. high
overdrive settings will be generating much
more preamp output level than lower, cleaner
settings. Due to the remarkable realism of our
Advanced Valvestate Technology, once the
Volume control is turned-up past a certain
point, the preamp will start to push the power
amp section into creating its own, desirable
distortion mode - just like an all-valve Marshall
amp. When this occurs, the AVT50's power
amp will start to add musical harmonics,
compression and ‘break-up’ into your sound.
8 Overdrive Tone Controls
The AVT50 is equipped with rotary Bass,
Middle, and Treble controls, for the Overdrive
Channel. These three passive EQ controls are
designed to achieve maximum tonal variation
from your AVT50 and, just like our famous all-
valve amps, are highly inter-dependent on
each other. As a result, the way each one
functions depends on the exact position of the
other two controls. This is especially true of the
Bass and Treble controls in relation to the
Middle control. The lower the Middle control,
the more reaction can be obtained from the
others. As tone is very much down to personal
taste, experimentation and experience is
probably the best way of learning how these
three controls will affect your sound. Some
suggested settings are shown later.
Points to remember are:
A) The tone and output level coming out
of the guitar is as widely variable as there are
guitars themselves, guitars are not designed
(nor intended) to be equal. Therefore, amp
settings will vary to suit your guitar and playing
style, and, by necessity, are at your discretion.
Again, if in doubt, consult your Marshall dealer
for advice.
B) The tone of your sound is also
dependent on the settings of the ‘tone’ controls,
and adjusting them to taste will further enhance
the sonic textures of your AVT50.
9 Reverb Depth Control
The AVT50 is fitted with an internal spring
Reverb unit. This control affects the mix of the
direct (dry) and Reverb signals - the higher the
control is set, the greater the depth of the
Reverb.
10 CD Input Jack Socket
The CD input will take a stereo signal from
an external source, such as a CD or tape
player, and mix it into a mono format. This will
allow you to play along with a pre-recorded
signal. Because this input is after the preamp
stages, its volume has to be controlled from
your CD or tape player.
11 Headphone Jack Socket
In addition to providing a specially filtered
output signal for a set of headphones, this jack
also disconnects the main loudspeaker,
enabling you to practice in ‘silence’.
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6
AVT50 1x12" Combo & AVT50H Head Front Panel Features
1 Input Jack Socket
This is where you plug your guitar into the
amp. In case you are not aware, you must
always use a screened guitar cable, never use
an unscreened speaker lead. Also, for the best
performance this cable should be one of high
quality. If you are in any doubt regarding this,
your Marshall dealer will be more than happy to
help and advise you further.
2 Clean Gain Control
When the Clean channel is selected, this
rotary control can best be described as the
sonic ‘brains’ of said channel. At lower
settings, this control will give you a wide range
of well defined clean tones. At higher settings,
this control will start to ‘crunch up’ the sound of
the channel in a ‘blues/rock’ type fashion. This
‘crunching up’ is often referred to as ‘break-up’.
3 Clean Volume Control
As its name suggests, this control
determines how loud the clean channel of your
AVT50 will be by controlling how much signal is
transferred from the preamp to the power amp.
The actual volume settings will be
dependent on how loud you want the channel
to be, and also what type of sound you have
selected on the pre-amp. Due to the
remarkable realism of our Advanced Valvestate
Technology, once the Volume control is turned-
up past a certain point, the preamp will start to
push the power amp section into creating its
own, desirable distortion mode - just like an all-
valve Marshall amp. When this occurs, the
AVT50’s power amp will start to add musical
harmonics, compression and ‘break-up’ into
your sound.
4 Clean Tone Controls
The AVT50 Clean Channel is equipped
with rotary Bass and Treble controls, with a
pre-set mid ‘scoop’. As is the case with our all
valve amps, these two passive controls are
very inter-dependent on each other. As tone is
very much down to personal taste, experimentation
and experience of the control’s functions is
probably the best way to learn how they will
affect your sound. We would advise spending
some time with these controls to see what suits
you best. Some suggested settings are shown
later, to act as possible starting points.
5 Channel Push-switch
Your AVT50 has two channels - Clean and
Overdrive. This switch selects the channel you
desire - ‘out’ for Clean and ‘in’ for Overdrive.
When using the supplied footswitch, the
channel push-switch must be left in the ‘in’
position for the footswitch to operate.
The Clean channel of the AVT50 has the
warm, responsive action normally associated
with a valve amp, rather than the relatively
sterile, one-dimensional sound that is typical of
many solid-state type guitar amps. At lower
Gain settings this channel remains very clean
but will evolve into bluesy/rock type crunch at
higher Gain settings.
When the Overdrive channel is selected it
will take you from mild crunch to aggressive
‘modern’ distortions and all-points in between.
The many sonic palettes available from
both channels are dependent on the exact
settings you choose on the front panel controls
for Gain, Volume and EQ.
6 Overdrive Gain Control
When the Overdrive channel is selected,
this rotary control acts as it’s sonic ‘brain’.
Lower Gain settings will give you a vintage
sounding, valve distortion while higher settings
will produce more modern, high-gain tones.
