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Marshall AVT20X, 50X, 50HX Manual

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8. Emulated DI Out Jack Socket
This jack socket carries a specially treated
output signal from your AVT20X which
accurately emulates the sonic signature of a
guitar loudspeaker. This output can be used in
both live performance and recording situations
to achieve authentic guitar amp tones without
having to use a microphone. Furthermore, if you
wish to mute the loudspeaker, for ‘silent’
recording, then merely insert an unused jack
plug (a short patch cable will do fine) or a set of
headphones into the Headphone socket.
9. 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’.
10. External Speaker Jack Socket
This socket allows you to connect your AVT20X
into an external loudspeaker system, provided it
has an impedance of 8 or 16 ohms. By using
any one of our comprehensive range of
extension cabinets, you will be able to unleash
the massive amount of tonal options that extra
loudspeakers will provide.
ENGLISH
ENGLISH
AVT20X Combo Rear Panel Features
1. Mains Input Connector
Your AVT20X is provided with a detachable
mains (power) lead which is connected here.
The specific mains input voltage rating that your
amplifier has been built for is shown on the back
panel. Before connecting for the first time,
please ensure that your electricity supply is
compatible with your amplifier. If you have any
doubt, please get advice from a qualified
person. Your Marshall dealer will help in this
respect.
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 AVT50X 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 AVT50X’s power amp will
start to add musical harmonics, compression
and ‘break-up’ into your sound.
4. Clean Tone Controls
The AVT50X 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.
AVT50X Combo & AVT50HX Head Front Panel Features
5. Channel Push-switch
Your AVT50X 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 AVT50X 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.
7. Overdrive Volume Control
As its name suggests, this control determines
how loud your AVT50X’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
AVT50X's power amp will start to add musical
harmonics, compression and ‘break-up’ into your
sound.
8. Overdrive Tone Controls
The
A
VT50X 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 AVT50X 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 AVT50X.
9. Reverb Depth Control
The AVT50X 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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