Marshall Valvestate 2000 AVT Owner`s Manual
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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,
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!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.
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WARNING! - Important safety instructions (cont.)
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 !
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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.
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