Control elements

Front panel of the BUGERA 333XL

Front panel

1The POWER switch is used to turn the power of the
BUGERA amplifier on and off.

2The 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 main- tained (POWER switch turned on). Flick the STAND- BY switch to change to the active mode (the above status light illuminates).

ATTENTION! TO AVOID DAMAGE TO YOUR !!AMP, NEVER USE THE BUGERA VALVE AM-

PLIFIER WITHOUT A LOUDSPEAKER CON- NECTED!

3The MASTER control adjusts the volume level of the BUGERA. First, bring the levels of the ampli- fier’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.

4The 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.
5The REVERB control determines the amount of the built-in reverb effect.
6The REVERB switch activates the REVERB effect (switch glows yellow).

7The 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.

8The 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.

9The VOLUME controls adjust the volume levels of all three amplifier channels.

10The TREBLE controls of the LEAD and CRUNCH channels adjust the upper frequency range (active shelving control for up to 15 dB boost/cut).

11The MID controls of the LEAD and CRUNCH chan- nels adjust the mid-frequency range (active peak/ notch control for up to 15 dB boost/cut).

12The BASS controls of the LEAD and CRUNCH chan- nels adjust the lower frequency range (active shelv- ing control for up to 15 dB boost/cut).

13The GAIN control lets you determine the input lev- el 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.

14The XL switches of the LEAD and CRUNCH channels change the amplifier’s response at low frequencies

(only 333XL and 333XL-212). It fattens up the tone by providing more low-end.
15The LEAD switch activates the LEAD channel (switch glows red).
16The CRUNCH switch activates the CRUNCH channel (switch glows yellow).
17 The passive TREBLE control adjusts the upper fre-

en

quency range of the CLEAN channel.

 

18The passive MID control adjusts the mid frequency range of the CLEAN channel.

19The passive BASS control adjusts the lower fre- quency range of the CLEAN channel.

20The CLEAN switch activates the CLEAN channel (switch glows red).

$$ You can activate the three channels with the supplied footswitch. Refer to „Footswitch“ for details.

21The HIGH GAIN input (333 and 333-212: INPUT) is 6 dB louder than the LOW GAIN input and is used for most electric guitars.

22The 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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