Marshall Amplification JTM Series Handbook

V

JTM

Valve Combos & JTM 600

Valve Head.

A

L

V

E

A

M

P

N

O

I

T

A

C

I

F

I

L

ENGLISH

1

From the Chairman

I would like to thank you personally for selecting

one of our JTM valve amplifiers.

For over thirty three years now my Company has
been recognised around the world as one of the
leading manufacturers of quality amplification. This
is a direct result of our continual investment in not
only research and development, but also people,
expertise and new production techniques to enable
us to design and manufacture consistently innovative
products, all of which are built to stand the rigours
of time.

Having been a musician myself for over fifty
years, I know that these things are important to all
musicians, but I also know that a major
consideration to any musician is the cost of
equipment. To this end I have made a conscious
effort to employ new techniques to keep the
production costs of the JTM range at as reasonable a
level as possible, without sacrificing any of the
Marshall trademarks such as tone and quality, with
which we would never compromise.

I would suggest that you read this handbook
carefully before operating your new JTM amplifier
and would like to wish you every success with your
new Marshall, which I am sure you will find a
pleasure to play for many years to come.

Yours sincerely,

WARNING!

Please read the following list carefully.

A. ALWAYS fit a good quality mains plug conforming to the latest B.S.I. standards where
necessary (UK only).

B. NEVER attempt to by-pass the fuses or fit ones of the incorrect value.
C. NEVER attempt to replace fuses or valves with the amplifier connected to the mains.
D. DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts.
E. ALWAYS have this equipment serviced or repaired by competent qualified personnel.
F. NEVER use an amplifier in damp or wet conditions.
G. DO NOT switch the amplifier on without the loudspeaker connected.
H. ENSURE that any extension cabinets used are of the correct impedance.
I. DO NOT obstruct airflow around the amplifier.
J. PLEASE read this instruction manual carefully before switching on.
WARNING : This apparatus must be earthed!

JTM Range Introduction

Marshall Amplification has been inextricably linked with valve amplification
since our very beginning in 1962. Products such as the original Bluesbreaker
combos, JTM 45 and Super-Lead heads were all destined to be, and have
become, classics in their own right.

All of these special Marshalls produced their magical tone by driving the guitar
through an all valve pre-amp into a pure valve power-amp. The JTM series carry
on this grand tradition but meet the demands of contemporary guitarists by
providing features such as channel switching, reverb, effects loop and speaker
emulated output.

Using Your JTM Amplifier

Your JTM Valve combo or head is easily capable of producing a wide range of
usable quality tones, from glassy vintage clean, Bluesbreaker type singing lead
and crunchy chord work to full blown modern high gain crush. What’s more the
controls are simple and intuitive to use giving you instant access to memorable
Marshall tones.

Whilst one should always bear in mind that taste in tone is a very subjective
matter, the following suggestions will give you a good starting point for getting
some great sounds from your JTM amplifier.

Clean

Make sure you select the Normal channel which is indicated by the green
L.E.D. The strength and height of your pick-ups will have a great influence on
the level you should set the volume on this channel before overdrive sets in.
Generally speaking the volume control should be set below half way for totally
clean sounds.

The tone network should be set with all three controls at 5 initially, then
adjusted to suit the type of guitar and sound required. Generally single coil
pickups will require extra bass and middle to give the sound more body, but
humbuckers may well require less middle and extra treble to cut through.

ENGLISH

2