Marshall 1962 Bluesbreaker Manual Del Usaurio página 8

REAR PANEL FUNCTIONS
1959SLP & 1987X REAR PANEL
11. LEVEL
Provides two different levels to suit
the type of effects connected to the
EFFECTS LOOP. The higher level
(+4dBV) suits rack processors and the
lower level (-10dBV) suits stompbox
effects.
12. BYPASS
This switch completely bypasses the
effects loop to maintain absolute tonal
integrity.
13. EFFECTS LOOP
To increase the flexibility of your
amplifier further you may choose to add
external effects. The effects loop allows
direct connection of either stompboxes
or rack processors.
Usually effects involving distortion
or wah wah would not go through the
effects loop, but between the guitar
and amplifier input. Time or modulation
based effects such as chorus, delay and
reverb are best suited to the loop.
SEND
Connect the input of the external
effects.
RETURN
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ENGLISH
Connect to the output of the external
effects.
14. SPEAKERS
Loudspeaker outputs. Connect your
speaker cabinet(s) here.
WARNING: Before connecting speakers
please ensure that OUTPUT SELECTOR
(Rear Panel Function #15) is correctly set to
match speaker cabinet(s) impedance.
15. OUTPUT SELECTOR
WARNING: Your amp should be completely
powered down before the OUTPUT
SELECTOR is turned.
The OUTPUT SELECTOR matches the
amplifier's output to speaker cabinet(s)
impedance.
With all-valve amplifiers it is imperative
that the amp is connected to a speaker
cabinet whilst in operation and that the
impedance selected on the amplifier
matches the total impedance of the
speaker cabinet(s) being used. For
example, if the amp is running into a
single 16 Ohm cab, the amp should
accordingly be set to 16 Ohms. If running
into two 16 Ohm cabs, the amp should
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