Control Elements; Front Panel - Bugera 333XL User Manual

Control elements

Front panel

1 The POWER switch is used to turn the power of the
BUGERA amplifier on and off.
2 The STANDBY switch allows you to place the amp
in STANDBY mode. This way the amp is idle, but the
operational temperature of the valves is maintained
(POWER switch turned on). Flick the STANDBY switch
to change to the active mode (the above status light
illuminates).
3 The MASTER control adjusts the volume level of the
BUGERA. First, bring the levels of the amplifier's three
channels into line and only then specify the overall
level with the MASTER control. Turn the control to
the right to increase the volume; turn it to the left to
reduce the volume.
4 The PRESENCE control modifies the amp's damping
factor at high frequencies (only 333XL and
333XL-212). This is used to fine-tune the high-
frequency range of the speaker cabinet.
5 The REVERB control determines the amount of the
built-in reverb effect.
6 The REVERB switch activates the REVERB effect
(switch glows yellow).
7 The FX LOOP/BOOST switch activates the FX LOOP
and the BOOST function (switch glows green).
You can also activate the FX LOOP with the
supplied footswitch. Refer to „Footswitch" for
details.
8 The NOISE GATE control determines the effect the
NOISE GATE filter has on the LEAD and CRUNCH
channels (only 333XL and 333XL-212). The further
you turn the control to the right, the more noise is
reduced. At low GAIN settings, the NOISE GATE
shouldn't be set too high or else the tones' sustain is
affected.
9 The VOLUME controls adjust the volume levels of
all three amplifier channels.
10 The TREBLE controls of the LEAD and CRUNCH
channels adjust the upper frequency range (active
shelving control for up to 15 dB boost/cut).
11 The MID controls of the LEAD and CRUNCH channels
adjust the mid-frequency range (active peak/notch
control for up to 15 dB boost/cut).
12 The BASS controls of the LEAD and CRUNCH channels
adjust the lower frequency range (active shelving
control for up to 15 dB boost/cut).
Front panel of the BUGERA 333XL
13 The GAIN control lets you determine the input level
of the LEAD and CRUNCH channels (the CLEAN
channel doesn't feature a GAIN control). Turn the
control to the right to increase the preamplifier's
distortion and sustain.
Please note that extremely high GAIN and
VOLUME settings in conjunction with high
MASTER settings can make the combo models
vibrate mechanically. This may occur when
played at extremely high volume levels, which
is seldom done. Should this be the case, adjust
the GAIN and VOLUME settings so that the
problem does not recur.
14 The XL switches of the LEAD and CRUNCH channels
change the amplifier's response at low frequencies
(only 333XL and 333XL-212). The effect is clearly
audible when the volume control of the guitar is
turned down a little. The tones respond more slowly
when the XL switch has been activated.
15 The passive TREBLE control adjusts the upper
frequency range of the CLEAN channel.
16 The passive MID control adjusts the mid frequency
range of the CLEAN channel.
17 The passive BASS control adjusts the lower frequency
range of the CLEAN channel.
18 The LEAD switch activates the LEAD channel (switch
glows red).
19 The CRUNCH switch activates the CRUNCH channel
(switch glows yellow).
20 The CLEAN switch activates the CLEAN channel
(switch glows red).
You can activate the three channels with the
supplied footswitch. Refer to „Footswitch" for
details.
21 The HIGH GAIN input (333 and 333-212: INPUT)
is 6 dB louder than the LOW GAIN input and is used
for most electric guitars.
22 The LOW GAIN input is used for instruments with
an extremely high output level which could distort
the HIGH GAIN input (only 333XL and 333XL-212).
The HIGH GAIN and LOW GAIN connectors have
identical sensitivity when used at the same time
(both with LOW GAIN sensitivity).
Control elements
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