3
11.. MMaaiinnss IInnppuutt SSoocckkeett wwiitthh iinnccoorrppoorraatteedd
MMaaiinnss FFuussee
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. Before connecting for the first time,
please ensure that your amplifier is compatible
with your electricity supply. If you have any
doubt, please get advice from a qualified
technician. Your Marshall dealer will help you
in this respect.
The correct value of mains fuse located in the
small drawer at the bottom of the mains socket
is specified on the rear panel of the amplifier.
The drawer contains a space for a spare fuse.
NEVER attempt to bypass the fuse or fit one of
the incorrect value!
NNoottee::
It is wise to carry spare fuses at all times.
22.. HHeeaaddpphhoonneess OOuuttppuutt JJaacckk
This is the output used to feed a standard
commercial set of headphones.
The signal here is derived from the speaker
output with added filtering in order to include
the power amp and output transformer’s
contribution to the overall tone.
A 16Ω dummy load is connected across the
headphone output to maintain the correct
‘reflected’ impedance for the power amp.
33.. HHeeaaddpphhoonneess//EExxtteennssiioonn SSppeeaakkeerr SSeelleeccttoorr
sswwiittcchh
This switch selects the routing for the output
signal.
With the switch toward the ‘Extension Speaker’
jack, only the internal speaker, or extension
speaker if used, will be active. Nothing will
appear at the ‘headphones’ output.
With the switch toward the ‘Headphones’ jack,
only the headphones jack will be active. The
extension speaker will be muted. A brand new
feature is the ‘Low Power Mode’. This can be
accessed by simply setting the rear panel
switch to ‘Headphones/Low Power Mode’. If
no headphones are plugged into the
headphones jack socket, then the low power
signal is routed directly to the internal speaker.
The volume in this mode is far more suited to
private practice at home.
44.. EExxtteennssiioonn SSppeeaakkeerr OOuuttppuutt JJaacckk 1166
Ω
This is the output used to feed an alternative
16Ω extension cabinet, a typical example being
a Marshall 4 x 12". When connecting the
extension cabinet, the combo’s internal
speaker is automatically disconnected.
ALWAYS ensure you use good quality speaker
(unshielded) cables. NEVER use guitar
(shielded) cables.
WWAARRNNIINNGG!!
Never use the amplifier without a
load (speaker cabinet/s) attached!
Always use a non-screened Marshall approved
speaker lead when connecting an extension
cabinet to these units.
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