Marshall 1962 BLUESBREAKER Manuel Du Propriétaire page 14

FRONT PANEL FUNCTIONS
2245 JTM45 FRONT PANEL
MAINS
MK
II
II
ON
1
1. MAINS
Mains power ON/OFF switch.
2. STANDBY
STANDBY is used in conjunction
with the MAINS power switch (Front
Panel Function #1) to 'warm up' the
amplifier before use and to prolong
the life of the output valves. When
powering up, always switch MAINS
power on first, leaving the STANDBY
switch in the 'standby' position. This
allows the application of the voltage
required to heat the valves to their
correct operating temperature. After
approximately two minutes the valves
will have reached the correct operating
temperature and the amplifier can be
engaged by switching MAINS power
ON.
Note: In order to prolong valve life, always
set the STANDBY switch to the 'standby'
position when turning the amplifier sound
on and off during breaks in performance.
Also, upon full power down, always put the
amplifier in 'standby' prior to switching off
the MAINS power.
3. INDICATOR
The power indicator will light when the
amplifier's mains power is switched on
STANDBY
ON
2 3
and will be unlit when the mains power is
switched off.
4. PRESENCE
Controls the overall amount of higher
frequency content in your sound. Turn
clockwise to add crispness and bite for a
more cutting tone. Presence is a power-
stage function and acts independently
of the preamp EQ controls.
5. BASS
Controls the amount of lower frequency
content, or bottom-end, in your sound.
Turning clockwise will increase the
bottom-end giving a fuller tone.
6. MIDDLE
Controls the middle frequency content
of your sound. Turning clockwise adds
girth. Turning anticlockwise reduces
middle frequencies giving a smoother,
more 'scooped' tone.
7. TREBLE
Controls the high frequency content
of your sound. Turning clockwise will
increase the highs giving a brighter tone.
Tonal Note: The preamp EQ network
is dynamic and highly interactive, and
because of this altering the setting of one
ENGLISH
PRESENCE
4 6 4
2 8 2
0 10 0
4
BASS MIDDLE
6 4
8 2
10 0
5 6
6
10