Marshall Amplification VT-1 Owner's Manual

VT-1 Vibratrem

Vibratrem Suggested Settings

Owners Manual

VINTAGE TREM (Amp: Clean)

SLOW SWELL (Amp: Clean)

CLASSIC VIBRATO (Amp: Clean)

SWITCHING VIBRATO (Amp: Clean)

WARNING!

IMPORTANT Precautions

Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way,
such as 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.

WARNING

Do not expose the apparatus to rain or moisture. Do not expose
the apparatus to dripping or splashing. No objects filled with
liquids should be placed on or near the apparatus. Do not use
this apparatus near water.

Clean only with dry cloth.

Changes or modifications not expressly approved by Marshall
Amplification plc could void the user’s authority to operate the
equipment.

Heed all warnings.

Follow all instructions.

Keep these instructions.

European Product Only

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1

3478

5

6

10

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From The Chairman

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

For over 40 years the Marshall name has been synonymous with
the greatest guitar tones in music. We have worked hand in hand
with guitarists from all levels throughout the world to maintain
and improve that special ingredient, ‘The Marshall Sound.’

Our range of effects pedals gives the opportunity to augment the
classic Marshall tone to add Marshall character to a guitar set­up.

All our pedals are made with the same utmost attention to
quality, in both materials and manufacture as our world
renowned amplifiers, cabinets and combos, in order to provide
you with optimum reliability and tone.

I would like to wish you every success with all of your musical
endeavours and also your new Marshall effects pedal, which I am
sure you will find a pleasure to play for many years to come.

Yours Sincerely,

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ENGLISH

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Introduction

Of all the retro effects to hit the shops in recent years, perhaps
the most authentic and coolest is tremolo. Instantly calling up
the spirit of the 60s, Tremolo was the first effect to appear on a
Marshall amp in the early 1960s. The late 90s sees Marshall
updating the tremolo effect in the form of the Vibratrem.

By using split phase modulation a truely awesome stereo sound
field can be created by connecting the VT-1 up to two amplifiers.

The Vibratrem features a passive bypass for the main signal path
to ensure complete tonal integrity and has a quality of tone
matched only by its versatility.

Here follows a complete run down of the Vibratrem's features for
your information. We have also enclosed a number of suggested
settings to help guide you. It should be remembered though that
these are only suggested settings and you should really take the
time to experiment.

If you take the time to explore the different effects within the
Vibratrem, you won’t be disappointed.

Features

1. ‘Out 2’ Jack Socket

The Vibratrem is a stereo footpedal. If you are using the
Vibratrem in a stereo configuration this Jack socket is for your
second output.

2. ‘Out 1 - Mono’ Jack Socket

This is the main output of the Vibratrem and is for connection to
the amplifier or to another effects pedal.

3. Mode

This allows you to switch between the Vibratrem's two modes,
Vibrato and Tremolo.
Tremolo - refers to change in signal volume. In Tremolo mode
the signal increases and decreases at a role governed by the
speed control. The tremolo on the VT-1 is specially designed to
recreate the natural swell and decay of a valve-based tremolo as
found on many vintage valve amplifiers.
Vibrato - By phase shifting the effected signal with respect to
direct, uneffected signal, a subtle pitch shifting vibrato is
created. The vibrato on the VT-1 has been developed to closely
mimic the vibrato settings on certain vintage valve amplifiers.
Note: the stereo output remains unchanged (i.e. tremolo) in
vibrato mode.

Always use good quality shielded leads.
Always use 9V regulated DC supply with centre negative.

Setting Up

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Although it may seem obvious the first action in achieving a
good effected sound (be it duration / compression etc.) is to find
the perfect bypassed sound. This will then allow the correct level
to be set with the effect unit to allow a cut or boost in volume
and a realistic tone.

On clean channels it is advisable to set the gain (or volume) to a
setting of no less than one quarter maximum so as not to get
unrealistic results due to any volume dependent tonal shaping on
the amplifier preamp.

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ENGLISH

4. Speed

Alters the speed of the modulation of the effect. Turn the control
anti-clockwise and the effect will slow down. Conversely, turn the
control clockwise and the modulation of the effect will increase in
speed.

5. DC Input

For input of a 9 V DC adaptor should you not wish to use
batteries.

6. LED

Indicates when the Vibratrem is in operation.

7. Depth

Controls the depth of the effect. Turn the control anti-clockwise
and the effect will be more subtle, turn the control clockwise and
the modulation of the effect will be increased.

8. Shape

The Shape control affects the modulation waveform of the VT-1.
In short, the shape of the modulation waveform determines the
manner in which the VT-1 circuitry turns the signal level up and
down in creating the tremolo and shifts phase in the case of
vibrato.

The triangle wave ( ) creates a gradual swelling tremolo and
subtly phasing vibrato.

The square wave ( ) produces a more abrupt change in
volume when Tremolo mode is engaged and a ‘de-tuned’ pitch
shifting vibrato in Vibrato mode.

9. In Jack

This is the input jack, for connection to your guitar or to another
effects pedal.

10. Foot Switch

For switching the Vibratrem on and off.

WHAT IF
NO
OUTPUT

SOUND TOO
TREBLY OR
FIZZY

UNUSUAL
HUM

BASS
FEEDBACK

SOUND TOO
MUSHY OR
BASSY

UNUSUAL
FEEDBACK

INDICATOR
LED NOT
ON

NOISE IN
BYPASS

CHECK

BATTERY

CHECK

LEADS

CHECK PEDAL

CONTROLS

DC INLET

CHECK AMP

CONTROLS

CHECK GUITAR

REDUCE

TREBLE

REDUCE

TREBLE

INPUT

LEAD

Trouble Shooting

33

3

3

3

3

3

3333

3

333

3

3

33

333

MOVE A

W

AY

FROM AMP

PICKUPS

MAY BE

VIBRATING

Battery Replacement

1. To replace the battery, open
the easily accessed coin screw
battery cover plate by
loosening screw as shown,
then disconnect the battery
connector lead.

2. Use PP3 or equivalent battery
(for improved battery life use
alkaline type)

3. Always ensure that the battery
is removed when the pedal is
not in use for long periods.

4. Dispose of old battery in a
safe place.

Technical Specification

Power: 9V DC Centre Negative Regulated
Current Draw: 16mA
Controls: Vibrato and Tremolo Mode, Speed, Depth and Shape
Switches: On/Off Switch
Indicators: On/Off LED
Jacks: 1 Input, 2 Output ‘Jacksockets’
Input Impedance: 1MΩ
Output Load Impedance: < 1kΩ
Dimensions: 120mm x 65mm x 55mm
Weight: 510 grammes

Unas palabras
del Presidente

Quiero agradecerte personalmente el haber elegido uno de
nuestros pedales de efectos.

Desde hace más de 40 años el nombre de Marshall es sinónimo
del mejor sonido de guitarra. Hemos trabajado mano a mano con
guitarristas de todos los niveles y de todas partes del mundo
para mantener y mejorar este ingrediente especial: “El sonido
Marshall”.

Nuestra nueva gama de pedales de efectos te da la oportunidad
de aumentar el clásico tono de Marshall o añadir “personalidad”
Marshall a cualquier equipo de guitarra. Están fabricados
prestando tanta atención a la calidad de los materiales como el
resto de la gama de amplificadores y combos Marshall, para
ofrecerte gran fiabilidad y tono.

Quiero desearte grandes éxitos en todas tus empresas musicales
y con tu nuevo pedal de efectos, que estoy seguro te resultará un
placer utilizar durante muchos años.

Sinceramente