Treble 2 - Mesa/Boogie MARK 1 RE-ISSUE Owner's Manual

FRONT PANEL:
BASS: This control determines the amount of low end present in the sound. Unlike most amplifiers, the BASS Control on the MARK
I is extremely powerful. Although it is fed by the TREBLE Control and is subject to its settings, the BASS Control is less sensitive to
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0
0
2
VOLUME 1 VOLUME 2
MIDDLE: This is the least significant of the three tone controls. Like the BASS Control, its strength is also dependent on the TREBLE
Control setting. It is very useful for smoothing out single note lead sounds, making them less "buzzy" and more focused. Clean sounds
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VOLUME 1 VOLUME 2
60/100 SWITCH: This switch sets the power output level of the MARK I. With the toggle switch up (100 watt position ), the amplifier
will produce 100 watts rms of clean power. To achieve full power in the 100 watt position, the speaker should be connected to the 8
100 RMS ON
POWER
60 RMS STANDBY TWEED
M
ARK I
to the 8 Ohm speaker jack, the amplifier will sound and feel very bold and punchy. ( Perfect for loud clean playing, or cutting through
a loud stage mix. ) Some players, however, find this sound and feel too stiff and revealing of mistakes. If you encounter this, no prob
lem. Simply connect the speaker to the 4 Ohm speaker jack and you have reduced your overall power to about 75 watts, while
softening the sound and feel substantially.
By using the 60 watt position ( toggle switch down ) with the speaker connected to the 8 Ohm speaker jack, a different sound and feel
can be achieved. Somewhat less "midrangey" and more hollow sounding, this set-up works whenever a clean sound is desired that
has a little different personality. Keep in mind that this mismatch ( 60 watt position - 8 Ohm speaker jack ) is a mismatch in the lower
than proper match direction. This causes the 6L6 power tubes to wear faster, and produces a much "harder" clip. Again, we encourage
you to experiment and find the tonality that suits you best.
(Continued)
0 0
BASS
MASTER TREBLE
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BASS
MASTER TREBLE
Ohm speaker jack located on the Rear Panel of the chassis. With the toggle switch down ( 60 watt
position ), the two middle power tubes are in a "standby mode", thus reducing the overall power to 60
watts rms. To achieve full efficiency in this position, the speaker should be connected to either of the
4 Ohm speaker jacks.
NOTE: Power and tone differences can be achieved through matching or mismatching speaker
impedances. This can not hurt your amplifier and is an interesting experiment that we encourage
you to try. For example: with the 60 / 100 switch up ( 100 watt position ) and the speaker connected
the TREBLE than in other amplifiers. Amazing amounts of rich, fat
bottom end can be obtained, making clean sounds very warm and
breathy. Because the BASS Control is so active, especially when in
channel 1 with the VOLUME 1 and VOLUME 2 set high, it should be
used sparingly. Too much Bass will cause a flabby unfocused sound
that can't be dialed out because excessive Bass has been introduced
to the pre-amp in the early stages.
need midrange for punch and attack to produce a bigger,
bolder sound. An interesting sound in channel 1 for lead
playing is achieved by turning the TREBLE and BASS Con-
trols to 0, and the MIDDLE Control to 10. This will reveal
the frequencies that this control works with, as well as pro-
ducing a fat, warm and very smooth tone.
MIDDLE
NOTE: With all three tone controls set to 0, the amplifier
will not produce any sound. At least one tone control must
be set above 0 to produce sound.
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