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49. Output Fuses With LED Fail Indicators
50. Loudspeaker Outputs
51. Impedance Selector Switch
52. Pentode/Triode Selection Switch
Operational Note I: Pentode/triode
This feature is particularly useful when tailoring your system to suit different sized venues and recording applications.
When switching this function the standby switch should always be switched off. The same also applies to items 39, 44,
47, 48 & 51.
53) Mains Input & Fuse
In the event of valve failure the HT fuse will blow to
protect the amplifier from damage. The LED will indicate
which valve pair is faulty. The Marshall "Failsafe" circuit
allows the amplifier to continue running on two valves
(providing it is not switched to half power), to get you to
the end of the gig.
Twin loudspeaker output jacks. It is important that the
speakers used are correctly wired and that the impedance
is correctly selected. Also ensure that the speakers are
capable of handling the full power of the amplifier. The
cabinet must be connected before switching on the standby
switch.
Selector to ensure correct match of cabinet impedance
to the amplifier (see impedance chart on page.9).
"Triode" operation gives half the rated power output
(Triode operation also gives a smoother tone) and
"Pentode" operation provides full rated output. (See
operational note I).
Socket for connection from the mains. Always ensure
that the fuse matches the labelling on the amplifier's
rear panel. If you have any doubts contact your dealer
or a qualified technician.
7
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