Marshall Amplification Class 5 H Valve Amplifier, Owner'S Manual

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W WA AR RN NIIN NG G:: Although your Class5 amplifier
has 2 extension speaker outputs (and a
headphone socket), never attempt to connect
cabinets to both extension speaker outputs
simultaneously. Only use one speaker output
at a time, the recommendations are: 1x8 Ohm
or 1x16 Ohm or headphones. Combining
these options may stress the power amplifier
section and, in extreme cases, may lead to
valve and/or output transformer failure.
1 1.. E Ex xtte en ns siio on n S Sp pe ea ak ke err 8 8 Ω
This is the output that connects to an 8
Ω
extension cabinet.
2 2.. E Ex xtte en ns siio on n S Sp pe ea ak ke err 1 16 6
Ω
This is the output that connects to a 16 Ω
extension cabinet.
3 3.. H He ea ad dp ph ho on ne es s/ /E Ex xtte en ns siio on n S Sp pe ea ak ke err
S Se elle ec ctto orr S Sw wiittc ch h
This switch routes the 16 Ω output signal to its
dedicated speaker output (2) or the
headphone output (4). When this switch is set
to ‘Headphones’ this is the only time it is
acceptable not to have an extension speaker
cabinet connected.
4 4.. H He ea ad dp ph ho on ne es s O Ou uttp pu utt
This is the output that connects to a standard
set of headphones.
T TE EC CH H N NO OT TE E:: 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.
An internal 16
Ω
dummy load helps maintain
the correct ‘reflected’ impedance for the power
amplifier.
5 5.. M Ma aiin ns s IIn np pu utt
Your amplifier 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 back panel. Before connecting for the
first time, please ensure that your amplifier is
compatible with your electricity supply. If you
have any doubt, please ask the advice of 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!
N NO OT TE E: It is wise to carry spare fuses at all
times.
R Re ea arr p pa an ne ell ffe ea attu urre ess
8 H
or 8
1 1 2 2 4 4
5 5
E
N
G
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S
H
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