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4
The Basics
We recommend that you fold out the inside back
cover of this manual so that diagrams of the
ampʼs front and rear panels are visible while you
read.
MAINS INPUT & FUSE (17)
Your amp 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 indicated on the
rear panel.
WARNING: Before going any further, make
sure your amplifier is compatible with your
electrical supply. If you have any doubt,
please get help from a qualified technician -
your Marshall dealer can help you in this
respect.
The correct value of mains fuse is specified on
the rear panel of the amplifier. NEVER attempt
to bypass the fuse or fit one of the incorrect
value.
Mains (POWER) Switch (1)
This is the On/Off switch for the mains electric
power to the amplifier.
Note: Please ensure the amplifier is switched off
and unplugged from the mains electricity supply
whenever it is moved!
INPUT Jack Socket (10)
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.
Getting Started & Powering Up
1. Make sure that the speakers/cabinet(s) are
connected to the correct impedance
LOUDSPEAKER jack(s) on the rear panel (11).
See page 8 for specifics regarding impedance
matching. If youʼre using an extension cabinet
make sure its rating is enough to handle the
power of the amp and also that youʼre using a
proper speaker cable. Never use a screened
(shielded) guitar cable for this purpose.
WARNING!
1. Failure to do any of the above will damage
your amp.
2. NEVER use your amp without a (speaker)
load attached when the Standby Switch is
ON.
Marshall recommends you always leave a
(speaker) load attached to the unit.
2. Ensure that both MASTER VOLUMES on the
front panel (5) are set to zero.
3. Connect the Footswitch Cable to the
Footswitch and then connect to the
FOOTSWITCH Socket (15) on the rear panel of
the amplifier.
4. Connect the supplied mains (power) lead into
the MAINS INPUT (17) on the rear panel first
and then into an electrical outlet.
5. Plug your guitar into the INPUT jack socket
(10) on the front panel.
6. Turn the front panel POWER switch (1) on.
This will glow red then wait for a couple of
minutes.
7. After waiting a couple of minutes, engage the
STANDBY switch (2). Leaving the amp on
ʻStandbyʼ for a period allows the valves to come
up to their correct operating temperature. In
order to prolong valve life, the STANDBY switch
should also be used to turn the amplifier on and
off during breaks in a performance.
STANDBY Switch & Silent recording (2)
As stated above the STANDBY Switch is used in
conjunction with the POWER Switch to ʻwarm
upʼ the amplifier before use and to prolong the
life of the output valves.
When the amplifier is in standby mode the
whole preamplifier section continues running at
its nominal voltages whilst the power amplifier
remains in a standby status. This allows the
amplifier to be used for silent recording or
preamplification purposes.
NOTE : Only when the STANDBY is off can
the amplifier be used without a load for silent
recording. Always ensure a load is
connected when leaving the silent recording
mode, i.e. when switching the STANDBY
switch ON.
ENGLISH
JVM 2 Ch Owners Manual Book-00089-01 /12/15 inner.qxd:Layout 1 14/12/15 10:08 Page 4
6


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