Marshall VALVESTTE AVT100 User's Manual
Contents
1. AMPLIFICATION AVTTIOO User Manual 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 x 3 4 iad WARNING Important safety instructions A PLEASE read this instruction manual carefully before switching on WARNING THIS APPARATUS MUST BE EARTHED ALWAYS use the supplied mains lead if a replace2. Loudspeaker Jack Sockets There is one speaker jacksocket on the AVT100 marked Internal 8 Ohm this is where the output of the AVT power amplifier is connected to its internal 8 Ohm Celestion loudspeaker WARNING Always provide the AVT100 with a load equal to or greater than 8 Ohms Footswitch For connection of the supplied Stage Foot Controller PEDL 00030 This sturdy 4 way Marshall footswitch allows instant selection of the 3 channels plus the DFX It also features LED s to indicate status Headphone The headphone output is fully emulated using an improved version of the circuitry found on the industry standard JMP 1 Turning the Master Volume 16 to zero will provide silent practice Emulated Line Output This jack socket carries a specially treated output signal from your AVT that accurately emulates the sonic signature of a Marshall 4x12 cabinet This unerringly accurate emulation circuitry is Marshall s most advanced to date and was developed via countless hours of technical research playing listening and fine tuning This output can be used in both live performance and recording situations to achieve authentic guitar amp tones without having to use a microphone Turn down the Master Volume 16 for silent recording FX Loop As already mentioned the AVT100 boasts a Mono Parallel FX loop for connection with external effects units In addition to the FX Mix control on the front pan
3. 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 Il 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 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 IH EX 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 amp 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 Dig
4. As a result the way each one functions depends on the exact position of the other two controls This is especially true ofthe 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 9 OD1 Channel Select Switch Pressing this front panel switch selects the Overdrive 1 OD1 channel of your AVT 9 OD1 Ga
5. C83 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 gr
6. S OUVRIR LE COUVERCLE CET APPAREIL NE COMPORTE AUCUNE PIECE SUSCEPTIBLE D ETRE REPAREE PAR VOS SOINS FAITES TOUJOURS APPEL A UN TECHNICIEN QUALIFIE POUR TOUTE REPARATION OUTPUT 100 WATTS RMS INTO 80 OF 1O FX Return FX Level FX Send mira i
7. 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 M n AVT100 Front Panel Features Clean 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 Clean 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
8. VED INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION AVT100 Combo Front Panel Features ALT 700 Valve Drive Pre Am Overdrive Tone OOO 10 Bass Middle Treble o 10 o 10 o 10 Clean Tone AVT100 Combo Rear Panel Features WARNING DO NOT OBSTRUCT VENTILATION GRILLES ATTENTION NE PAS OBSTRUER LES GRILLES DE VENTILATION WARNING Risk OF HAZARDOUS ENERGY AVIS ENERGIE ELECTRIQUE DANGEREUSE NS Loudspeaker Minimum Total Imp 89 Internal 89 Footswitch Headphones Jean Overdrive F DFX Mix Emulated Line Output Adjust Program oo Q 9 o 10 o 10 OPEN TO REDUCE THE RISK OF FIRE OR Digital FX Program Adjust Halls Decay Time Rooms Decay Time Plates Decay Time Gated reverb Decay Time Chorus Fate Flange Delay Chorus Room Ch Diy Room Modulation Speed Decay Time ELECTRIC SHOCK DO NOT REMOVE COVER WARNING SHOCK HAZARD DO NOT iy CAUTION 70 REDUCE THE RISK OF ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE THIS APPARATUS MUST BE EARTHED AWIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR POUR EVITER LES RISQUES D INCENDIE ET DE DECHARGES ELECTRIQUES N EXPOSEZ JAMAIS CET APPAREIL A L HUMIDITE OU A LA PLUIE CONNECTER CET APPAREIL A LA TERRE NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ATTENTION POUR EVITER LES RISQUES DE DECHARGES ELECTRIQUES NE PA
9. as 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 WARNING Important safety instructions cont gt Caution Any changes or modifications not expressly approved by the party responsible for compliance may void the user s authority to operate the equipment gt Note It is recommended that all audio cables with the exception of the speaker lead used to connect to the AVT100 Combo are of a high quality screened type These should not exceed 10 met
10. eat 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 Introduction cont 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 I The Pre amp Section Your AVT100 combo amp boasts three independent channel
11. el see Front Panel Features point 18 this FX loop comprises of an FX Send jack an FX Return jack and an FX level control button 9 FX Return For connection to the output of your external effects device 9 FX Level This should be set to match the level of the processor being used generally 10dB for a stomp box 4dB for a professional rack unit rx send For connection to the input of the external device being used gt FX Loop Hints a Always use high quality shielded patch cables b If the processor being used has an input level control ensure it is set correctly c Time based effects delays amp reverbs and modulation effects chorus flange phase etc are ideal for use in a Parallel FX loop d Certain stomp box effects such as Wah distortion overdrive and fuzz were designed specifically for use in front of the amp and sound best when used that way This said tonal beauty is in the ears of the beholder so if such a pedal sounds great to you when used in an FX loop then go for it Sometimes there are no rules M a Made in England by Marshall Amplification plc Bletchley Milton Keynes England Mains Input 120V 60Hz 175 Watts NOTE THiS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS 1 THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE AND 2 THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEI
12. h each amp 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 Program lt gt Adjust Halls BEI Decay Time Rooms E Decay Time Plates Decay Time Gated reverb D Decay Time Chorus 17 Rate Flange 12 Rate Delay 13 Time Chorus Room 14 Decay Time Ch Dly Room 15 Time Modulation 16 Speed 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 AVT100 Rear Panel Features 9 Mains Input Connector Your AVT 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 seek advice from a qualified technician Your Marshall dealer will help in this respect
13. in 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 OD1 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 AVT100 Front Panel Features O 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 a
14. ital 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 AVT100 Front Panel Features 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 Hall A this is a large bright sounding concert hall Wembley Arena are you ready to rock Hall B warmer sounding than Hall A this program is perfect for adding depth and character to clean and aco
15. ment is required please contact your authorised Marshall Dealer NEVER attempt to by pass the fuses or fit ones of the incorrect value DO NOT attempt to remove the amplifier chassis there are no user serviceable parts 000 00 Refer 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 NEVER use an amplifier in damp or wet conditions No objects filled with liquids should be placed on the apparatus When cleaning only use a dry cloth ALWAYS unplug this apparatus during lightning storms or if unused for long periods of time Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and at the point where they exit from the apparatus DO NOT switch the amplifier on without the loudspeaker connected 00 90 ENSURE that any extension cabinets used are of the correct impedance O EUROPE ONLY C Note This equipment has been tested and found to comply with the requirements of the EMC directive Environments E1 E2 and E3 EN 55103 1 2 and Low Voltage directive in the E U gt EUROPE ONLY Note The Peak Inrush current for the AVT100 is 22 amps This equipment h
16. n 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 OD2 Channel Select Switch This selects the Overdrive OD2 channel of your amp 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 cr
17. om 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 amp 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 AVT100 Front Panel Features DFX Mix Control Clean amp 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 amp 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 Program Clean amp 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 wit
18. res in length Always use a non screened Marshall approved speaker lead when connecting an extension cabinet to these units D 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 Mm x 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 EC
19. s Clean Overdrive 1 and Overdrive 2 The preamp section is where the gain tone and relative volume of these three channels is determined 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 O Clean Channel Selector Switch This allows selection of the Clean channel via the front panel 9 Clean 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 4 Bright 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
20. ushing crunch perfect for modern a k a nu metal 0D2 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 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 ODI 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
21. ustic 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 second Chorus Ro
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