Front panel features – Marshall Amplification VALVESTTE AVT100 User Manual

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AVT100 Front Panel Features

AVT100 Front Panel Features


Hall A: this is a large, bright sounding, concert hall. “Wembley Arena, are you ready to


Hall B: warmer sounding than Hall A, this program is perfect for adding depth and character
to clean and acoustic tones.


Hall C: a medium sized hall with 12ms of delay before the reverb starts.


Room 1: a hardwood studio with lots of early reflections. Perfect for acoustic type sounds.


Room 2: perfect for adding some subtle ambience.


Room 3: warmer sounding than Room 1, perfect for clean or acoustic work.


Plate 1: a bright, transparent plate sound ideal for lead work.


Plate 2: warmer sounding than Plate 1, this program is great for adding sustain, especially
on clean and acoustic tunes.


Plate 3: an accurate emulation of a vintage tube plate reverb. As this program has very little
low end it is great for adding ‘cut.’


Gated Reverb: by ‘chopping-off’ the end of the reverb's decay ‘tail’ via a Noise Gate, this
program is great for spicing-up chord stabs without cluttering up your sound.


Chorus: splitting the signal and then mixing the dry signal with a detuned version creates this
popular effect. To add to the subtle ‘widening’ this creates, the detuned signal is modulated
by an LFO (Low Frequency Oscillator) which causes the detuning to vary. The result is a
subtle, lush sound that is equally effective on both clean and dirty tones.


Flange: similar to chorus but much more ‘jet’ like in nature.


Delay: this creates an echo repeat of the original signal. The delay time is adjustable in 10
millisecond (ms) increments and can be set to be as long as 1270ms which is well over 1


Chorus/Room: as the name suggests, this combines Chorus and a large room Reverb.


Chorus/Delay/Room: if program 14 isn't dramatic enough for you then this is definitely the
one for you, as it adds Delay to the Chorus & Reverb mix!


Modulation: this effect is similar to the chorus effect but is less subtle and can be used to
create rotary speaker-like effects.

the case of plate reverbs, a mechanically vibrating metal plate. These echoes are extremely
complex in nature and are, therefore, notoriously difficult to recreate. In developing these 10
programs we’ve gone to great lengths to ensure that none of the harsh digital ‘graininess’ normally
associated with some digital reverbs is present.

Below is a brief description of each of the 16 DFX programs available:


Overdrive Tone Controls

Your AVT is equipped with rotary Bass,

Middle, and Treble EQ controls which are
shared between the two Overdrive Channels,
OD1 and OD2. This EQ section boasts a tone
circuit identical to the one used in legendary
Marshall valve amplifiers such as the 100 Watt
‘Plexi’ and the JCM800 2203, making it a
foundation stone for that instantly recognisable
and unsurpassable ‘Marshall Sound.’ As was
the case with the Clean channel’s EQ network,
these controls are interactive and, as a result,
allow endless tonal possibilities.


Remember that in addition to these

three controls, further tonal adjustment is also
afforded by the Scoop button (13) and also the
Master Presence control which is explained
later (17).

II. The Master Section

These controls adjust the power amp

section of your AVT and determine the overall
Volume and Presence of the amplifier.


Master Volume

Once you have set the relative volumes of

your AVT’s channels, this control governs the
overall volume of the amplifier.


Master Presence

A feature normally only found on

expensive valve amplifiers, the Presence
control affords you increased high frequency
control by altering the power amplifier’s
feedback. Increasing the Presence control will
emphasise high-end ‘fizz’ in overdriven tones
and top-end ‘sparkle’ in clean sounds.

lII. FX Section

A. Parallel FX Loop

Your AVT boasts a rear-panel mounted

Parallel FX loop for use with external effects
devices. This FX loop is Mono so if using a
stereo effects processor you would need to
connect to the ‘mono’ output on the processor.


FX Loop Mix Control
(Clean & Overdrive)

When an effects unit is hooked-up to the

aforementioned FX loop, this control adjusts
the FX Mix for all three channels. Turning it
clockwise increases the amount of effect you
hear - from ‘dry’ (0) to ‘wet’ (10).

Please note that the FX mix on your

external processor should be set to maximum
(i.e. ‘wet’).

B. Internal Digital FX

As mentioned in the introduction of this

manual, the AVT100 features a DFX (Digital
Effects) section which adds digital effects to all
three channels.

The DFX section boasts 16 on-board

effects and three controls - DFX Mix, Adjust
and Program.

We chose these particular effects

algorithms to give you a comprehensive palette
of natural sounding options. When developing
the DFX section, our aim was to enhance the
overall sound of the amplifier and, most
importantly, allow the effects to work with you
instead of masking your all-important tone
underneath layers of artificial sounding digital
signal processing.

The first 10 programs offered are all

Reverbs. Reverberation effects recreate the
natural echo reflections found in physical
environments such as halls and rooms or, in