6
6. Loudspeaker Output Select -
(DSL401 Only)
This switch selects the output impedance of the
amplifier for either 8 or 16 ohm use, to match to
alternate speaker systems. Although more on
this will be covered later, it is important to
remember that the internal loudspeaker is 16
ohms and that the amp must be set to match that
(16 ohms).
7. Loudspeaker Output Jacks
One (1) only on DSL201, two (2) on DSL401.
These are identified by having RED jack socket
nuts and connect the amplifier output to either
the internal (or an external) loudspeaker system.
WARNING! At no time must the amplifier be
allowed to run with no loudspeaker (or
appropriate loudspeaker type load) connected to
its output. Otherwise serious and expensive
damage may occur.
8. H.T. Fuse - See specifications for
correct value
This fuse protects your amp in the case of a fault
occurring with any of the high voltage circuit of
your amp. The usual reason for this to blow is
when an output valve has become faulty.
9. Mains Input
Use the supplied power cord to connect your
amp to the mains supply.
10. Mains Fuse - See specifications
for correct value
This fuse provides overall safety protection in
the case of your amplifier developing a major
electrical fault.
✪
User Hint - The fuses fitted to your amp are
there to provide you with safety protection in the
case of a fault developing. If they blow it means
something is wrong, usually a valve is getting
old, but under no circumstances fit a fuse of a
different value to stop it from blowing, as this
could be very expensive in terms of safety and
cost. Remember, if a fuse blows, it has blown
for a reason.
LOUDSPEAKER SYSTEMS
The DSL201 and DSL401 combo amps are each
fitted with a Marshall designed 12” loudspeaker,
each one developed to work with your amp to
produce the great tone that you expect from a
Marshall amp. The 1x12” format makes for a
very highly portable package that works great in
most circumstances. However, if you require a
bigger sound, or just a different one, there are
numerous cabinets manufactured by Marshall
that will interface with your DSL combo, with
ultimate ease.
The DSL201 is fitted with a single loudspeaker
socket preset at an impedance of 16 ohms, which
is normally plugged into the internal 16 ohm 12”
loudspeaker. To use an external loudspeaker,
just unplug the internal speaker and plug into
your external cabinet (this must be 16 ohms
only), for instance, a Marshall 1960 4x12”.
The DSL401 is fitted with two parallel wired
loudspeaker jack sockets and a selector to switch
between the normal 16 ohms (to suit the internal
speaker) or 8 ohms. This makes the choice of
extension cabinets even wider. For instance, not
only could you use a Marshall 1960 4x12” cab,
with or without the internal speaker (set amp to
8 ohms if using both, keep on 16 ohms if using
without internal speaker), but you could also
make the choice of various Marshall 1x12” or
2x12” extension cabs. But always make sure
that the output selector is set correctly !
i.e.
1 x 16 ohm speaker = 16 ohm output
2 x 16 ohm speaker = 8 ohm output
1 x 8 ohm speaker = 8 ohm output
WARNING! Never operate your DSL valve
amp without a loudspeaker, or suitable
loudspeaker type load, connected to the output,
even when using the output Master Volume set
to zero for silent recording. Otherwise
expensive damage may occur!
USING EFFECTS SYSTEMS
Your DSL combo amp is fitted with parallel FX
Loop, this is placed after the gain and distortion
parts of the preamp and is the ideal place for
inserting time varying effects, such as delay,
digital reverb, chorus, pitch shifting, etc. By
being a parallel loop, this means that the direct
signal is kept within the DSL’s circuit and
therefore your tone is not degraded by sending it
outside the amp. To use the loop connect your
effects processor (rack type units are better at
this job) as described earlier, turn the effects
units direct signal path off (the FX units manual
will tell you how to do this), set up the unit to
give you the effect you require and then balance
your direct sound and effected sound using the
FX MIX control on the front of your amp. Easy!
Floor type effects stomp boxes are designed to
work in between a guitar and the input of an amp
and should not be used in a parallel loop,
otherwise some very weird and undesired effects
could occur. For their best use, use them where
they are designed to go.
