Marshall Amplification Valvestate 2000 AVT series Bedienungsanleitung

ENGLISH

From Jim Marshall

I would like to thank you personally for selecting one of our

Valvestate 2000 AVT amplifiers.

Ever since its initial launch in the early 1990’s, the original

Marshall Valvestate technology received worldwide acclaim and set a

new standard in affordable quality amplification. However, my

dedicated team of designers are constantly looking for methods to

make our amplifiers sound even better. As they are all guitar players

themselves this process has become a passion within the design

department.

As the name Advanced Valvestate Technology (AVT) suggests,

your new amplifier benefits from their research and utilises their

latest circuit innovations, all of which are totally unique to Marshall.

By emulating the feel and response of an all-valve amplifier even

more closely, the new AVT range perform brilliantly and represent

yet another major step forward in guitar sound technology.

I suggest that you read this manual thoroughly before operating

your new amplifier and keep it in a safe place for future reference.

This will help you to derive maximum enjoyment from our Advanced

Valvestate Technology.

Wishing you every success.

Yours Sincerely,

ENGLISH

WARNING! - Important safety instructions

WARNING: THIS APPARATUS MUST BE EARTHED!

APLEASE read this instruction manual carefully before switching on.

BALWAYS use the supplied mains lead, if a replacement is required please contact your

authorised Marshall Dealer.

CNEVER attempt to by-pass the fuses or fit ones of the incorrect value.

DDO NOT attempt to remove the amplifier chassis, there are no user serviceable parts.

ERefer all servicing to qualified service personnel including replacement of fuses and

valves. Servicing is required when the apparatus has been damaged in any way, such as

when the power supply cord or plug is damaged, liquid has been spilled or objects have

fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not

operate normally or has been dropped.

FNEVER use an amplifier in damp or wet conditions.

GALWAYS unplug this apparatus during lightning storms or when unused for long periods of time.

HProtect the power cord from being walked on or pinched particularly at plugs, convenience

receptacles and at the point where they exit from the apparatus.

IDO NOT switch the amplifier on without the loudspeaker connected.

JENSURE that any extension cabinets used are of the correct impedance.

➲

Note: This equipment has been tested and found to comply with the requirements of the EMC

directive (Environments E1, E2 and E3) and Low Voltage directive in the E.U.

EUROPE ONLY - Note: The Peak Inrush current for the AVT100 is 22 amps.

This equipment has been tested and found to comply with the limits for a Class B digital device,

pursuant to part 15 of the FCC rules.

These limits are designed to provide reasonable protection against harmful interference in a

residential installation. This equipment generates, uses and can radiate radio frequency energy

and, if not installed and used in accordance with the instructions, may cause harmful interference to

radio communications. However, there is no guarantee that interference will not occur in a particular

installation. If this equipment does cause harmful interference to radio or television reception, which

can be determined by turning the equipment off and on, the user is encouraged to try to correct the

interference by one or more of the following measures:

◆

Reorient or relocate the receiving antenna.

◆

Increase the separation between the equipment and the receiver.

◆

Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

◆

Consult the dealer or an experienced radio/TV technician for help.

ENGLISH

➲

Caution: Any changes or modifications not expressly approved by the party responsible for

compliance may void the user’s authority to operate the equipment.

➲

Note: It is recommended that all audio cables used to connect to the AVT100 Combo are of a

high quality screened type. These should not exceed 10 metres in length.

➲

WARNING: Do not obstruct ventilation grilles and always ensure free movement of air around

the amplifier!

USA ONLY - DO NOT defeat the purpose of the polarised or grounding type plug. A

polarised plug has two blades with one wider than the other. A grounding type plug has two

blades and a third grounding prong. The wide blade or the third prong is provided for your safety.

When the provided plug does not fit into your outlet, consult an electrician for replacement of the

obsolete outlet.

FOLLOW ALL INSTRUCTIONS AND HEED ALL WARNINGS

KEEP THESE INSTRUCTIONS !

WARNING! - Important safety instructions (cont.)

ENGLISH

Introduction

What is AVT?

Advanced Valvestate Technology, or AVT for short, is a major step forward in hybrid amplifier

design which is exclusive to our new Valvestate 2000 (VS2000) Series of amplifiers. It has evolved

from the original, critically acclaimed Marshall Valvestate technology, but is improved so that it

emulates even more closely the feel and response of the classic Marshall all-valve power

stage...without using valves.

It is not only the power stage that has been significantly improved in the VS2000 Series. Much

careful attention to detail and many hours of development have also gone into the preamp section

too. As a result, each AVT channel offers the widest possible range of control and shape to your

sound, with an ECC83 (a.k.a.12AX7) preamp valve adding to the all-important tone and feel of

these latest Marshall creations.

Valve Drive Pre-amp

As just stated, each amp in the VS2000 range boasts a preamp stage equipped with an

ECC83 Dual Triode valve. Drawing on our vast experience in this field, we have gone to great

lengths to ensure that this precious device delivers maximum sonic benefit at all settings and

volume levels. As a result, the clean sounds ring with the ‘bell-like

’

harmonics that only a valve

preamp can deliver and, when pushed, the break-up is never harsh or unnatural sounding.

Whenever an AVT Overdrive channel is selected the ECC83’s dual triode is saturated to its limit,

providing the dynamics and feel worthy of a place in the Marshall hall of fame.

Power Amp Delivery

The same sort of toneful care and attention was also focused on the all-important power

stages of the AVT series. Our goal was to ensure that each one would create the warm, musical

feel and 3-dimensional sounds that have made our all-valve power amps world renowned. In

addition, these VS2000 products were designed to deliver the goods in the often hostile and

unpredictable environment of the live performance stage - which is why all the AVT power amps,

from the AVT50 upwards, are fan cooled for optimum reliability.

'Extended Bass Response' Loudspeakers

Knowing how important the relationship between the amplifier and speaker is, this is another

area where we spent a great deal of time and effort when developing the VS2000 Series. By

working extremely closely with our long-term colleagues at Celestion Loudspeakers, we have

successfully developed a range of speakers which, through radical design, re-define the state-of-the

art in rock guitar reproduction. In a nutshell, they allow the compact closed back cabinets used in

the AVT range to maintain the bottom end delivery normally only associated with a full 4 x12

cabinet set-up.

ENGLISH

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

Introduction (cont.)

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.

2Clean Channel Selector Switch

This allows selection of the Clean channel

via the front panel.

3Clean 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.

4Bright 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.

ENGLISH

AVT100 Front Panel Features

5Clean Volume Control

As its name suggests, this control

determines the volume of the clean channel.

The actual setting you choose will be

dependent on how loud you want the channel

to be, and also on the 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 - just like an all-valve Marshall amp.

When this occurs, the AVT’s power amp will

start to add musical harmonics, compression

and ‘break-up’ into your sound.

Note:

As each channel has its own volume

control, you can easily balance the levels of all

three channels as you so desire. Once set to

your satisfaction, these controls can be left

alone and you can use the amp’s Master

Volume knob (16) to set your overall volume

level.

6Clean Tone Controls

The Clean channel is equipped with rotary

Bass, Middle, and Treble controls. These three

passive EQ controls are designed to achieve

maximum tonal variation from your AVT

amplifier. Just like the tone controls on our

famous all-valve amps they 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. As you will

discover, the lower the Middle control is set,

the more ‘reactive’ the others become.

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. To offer

you some guidance, suggested settings are

shown later on in this manual.

Points to remember are:

When selecting a sound on any amp:

a) The tone and output level coming out

of each guitar is as widely variable as guitars

themselves. Remember, guitars and also

pickups are not designed (nor intended) to be

equal. Therefore, amp settings will vary to suit

both your guitar and your playing style, and, by

necessity, are at your discretion.

b) The tone of your sound is also

dependent on the way you set-up the Volume,

Gain and Tone controls of your amp. Taking

the time to adjust them to taste will further

enhance the sonic textures of your AVT. As is

true of all the best things in life, it is worth

investing some time playing around until you

find the desired sweet spot!

Note:

The amp’s Master Presence control (17)

affords you further adjustment of the high end.

7OD1 Channel Select Switch

Pressing this front panel switch selects

the Overdrive 1 (OD1) channel of your AVT.

8OD1 Gain Control

This rotary control can be best described

as the ‘sonic brain’ of the OD1 channel. Lower

Gain settings will produce well-defined, natural

sounding overdrives which have a nice ‘cut,’

making them perfect for funky, blues rock.

Higher gain settings will see the sound start to

get more ‘rounded’ as the AVT’s pre-amp

valve is pushed into saturation.

9OD1 Scoop Switch

Fine tuned to create the most awesome

mid ‘scoop’ imaginable, OD1’s Scoop circuitry

is more than just a pre-set middle control.

Instead it actually reconfigures the whole post-

EQ voicing of the channel - from low to high.

Because of this, even though the resulting

‘scooped’ sound that occurs when the switch is

activated (pushed ‘in’) is totally extreme, the

channel’s overall tone still remains tight and

focused.

ENGLISH

AVT100 Front Panel Features

10 OD1 Volume Control

As its name suggests, this control

determines the volume of the OD1 channel.

The actual setting you choose will be

dependent on how loud you want the channel

to be, and also on the type of sound you have

selected on the pre-amp (i.e.: high Gain

settings will generate much more preamp

output level than lower, cleaner sounding Gain

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 - just like an all-valve Marshall amp.

When this occurs, the AVT’s power amp will

start to add musical harmonics, compression

and desirable ‘break-up’ to your sound.

As previously stated, each channel has its

own volume control so you can easily balance

the levels of all three channels. Once set to

your satisfaction, these controls can be left

alone and you can use the amp’s Master

Volume knob (16) to set your overall volume

level to best suit each playing situation and

venue.

11 OD2 Channel Select Switch

This selects the Overdrive (OD2) channel

of your amp.

12 OD2 Gain Control

Cranking the OD2 Gain control will

unleash the most extreme gain levels ever

found on a Marshall Valvestate amplifier. The

higher settings of the OD2 gain control can be

likened to driving the front-end of an already

raging Marshall valve amp with a high gain,

overdrive stomp box. If you’ve already

experienced the tonal pleasure of ‘front ending’

a Marshall valve amplifier in this way, you will

appreciate the energy and dynamics of this

type of set-up!

Turning the OD2 Gain control clockwise

will see more of the already smouldering signal

being sweetly compressed and ‘rounded’ by

the unique characteristic of the AVT’s Valve

Drive stage as it is driven over the top into

total saturation. This channel can also be as

nasty and ‘in-yer-face’ as you would like.

Engaging the OD2 ‘Scoop’ button (13) will take

this channel onto a new level of cranium

crushing crunch, perfect for modern (a.k.a.

‘nu’) metal.

13 OD2 Scoop Switch

As is true of the OD1 Scoop, this circuit

acts like an advanced, pre-set contour control

that not only ‘scoops-out’ the mids but also

shapes the highs and lows for a tight, focused

sound. Engaging OD2’s Scoop Switch loads

you up with a ‘bottom heavy’ sound perfect for

the de-tuned, high-gain aggression favoured

by many modern acts.

14 OD2 Volume Control

This control regulates the drive of the

OD2 channel into the power stage of the

amplifier, hence controlling its output volume.

You will find that the louder you go, the looser

the bottom end of your sound will become.

Having said this, the closed-back cabinet

design of your AVT is such that it will deliver

tight, well-defined low end at much higher

volumes than any other ‘hybrid’ amplifier

known to man.

ENGLISH

AVT100 Front Panel Features

15 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.

Note:

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.

16 Master Volume

Once you have set the relative volumes of

your AVT’s channels, this control governs the

overall volume of the amplifier.

17 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.

18 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

ENGLISH

AVT100 Front Panel Features

1Hall A: this is a large, bright sounding, concert hall. “Wembley Arena, are you ready to

rock!?”

2Hall B: warmer sounding than Hall A, this program is perfect for adding depth and character

to clean and acoustic tones.

3Hall C: a medium sized hall with 12ms of delay before the reverb starts.

4Room 1: a hardwood studio with lots of early reflections. Perfect for acoustic type sounds.

5Room 2: perfect for adding some subtle ambience.

6Room 3: warmer sounding than Room 1, perfect for clean or acoustic work.

7Plate 1: a bright, transparent plate sound ideal for lead work.

8Plate 2: warmer sounding than Plate 1, this program is great for adding sustain, especially

on clean and acoustic tunes.

9Plate 3: an accurate emulation of a vintage tube plate reverb. As this program has very little

low end it is great for adding ‘cut.’

10 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.

11 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.

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

13 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

second.

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

15 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!

16 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:

ENGLISH

AVT100 Front Panel Features

19 DFX Mix Control

(Clean & Overdrive FX)

This determines the level of the internal

effects selected by the Program control (21). In

general you will find that the modulation effects

(e.g.: Chorus, Flange) require more level than

the reverbs and delays. As always, let your

ears decide what is right!

20 Adjust Control

(Clean & Overdrive FX)

For each of the 16 selectable DFX a

particular parameter is adjustable. For

example, when a Reverb is chosen, the decay

(how long the reverb will be heard before it

fades away) is adjustable via this control. The

‘Program/Adjust’ table (22) on the front panel

of your amp lists what the Adjust control does

for each of the 16 programs.

21 Program

(Clean & Overdrive FX)

This selects each one of the 16 on board

digital effects. The DFX available include

single effects such as Reverb (9 types), Delay

or Chorus and also multi-FX such as

Chorus/Delay/Room. To add further to the

flexibility of the DFX sections it can be

switched on and off via the sturdy, 4 way foot-

controller which comes supplied with each amp.

22 Digital FX Program/

Adjust Table

This lists the 16 programs selectable via

the Program control (21) and also indicates

which parameter the Adjust control (20)

modifies for each one. For added convenience,

this table is shown below.

23 Power Switch

Wait for it...yes, this switches the amp on

and off! When the amp is on the power switch

is illuminated and vice-versa. Advanced power

amplifier muting circuitry provides anti-thump

protection on power up and down.

Important Note:

As is the case with an all-

valve amplifier, there will be no signal heard

until the amp’s ECC83 preamp valve warms-up

and starts to pass signal. This can take up to

15 seconds so don’t panic!

Program

Halls

Rooms

Plates

Gated reverb

Chorus

Flange

Delay

Chorus/Room

Ch/Dly/Room

Modulation

Adjust

Decay Time

Rate

Time

Decay Time

Time

Speed

1 - 3

4 - 6

7 - 9

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