Mesa/Boogie MARK 1 - Manual (Page 11)

PAGE 7
REAR PANEL:
(Continued)
FUSE
3A GRND SLAVE LOOP PRES
FX LEVEL FX LEVEL
OUT IN
2
5 6 7
8
1 0 10
9
3
4 2
5 6
7
8
1 0 10
9
3
4
FUSE
3A GRND SLAVE LOOP PRES REV
FX LEVEL FX LEVEL
OUT IN
2
5 6
7
8
1 0 10
9
3
4 2
5 6
7
8
1 0 10
9
3
4
2
5 6
7
8
1 0 10
9
3
4
SPKRS
2
5 6
7
8
1 0 10
9
3
4
8 4 4
PRESENCE: The primary function of the PRESENCE Control is to attenuate the high end and control dynamic compression in the
power section. High settings produce more sparkle, cut and lend a more open quality to the Channel. Low settings of the PRESENCE
Control compress the sound and enhance the more vocal like
qualities of single notes. This control can also produce a fatter,
warmer character, especially when lead style sounds are dialed
up on the
MARK I . Lower Treble settings, combined with low
Presence settings produce the richest, roundest lead sounds.
REVERB: This control determines the amount of Reverb that is mixed with the signal. You’ll notice that the sound of the Reverb is
incredibly pure and sweet, giving even the best digitals a run for their money! This is due to our unique circuitry, combined with a
custom-made three spring reverb tank. This combination delivers an attack that is clean and harmonically correct - along with a decay
that is smooth and not at all “springy”. You may at first
be unaccustomed to the clarity and the lack of typical
spring reverb noise, and you may find yourself crank-
ing it up. Give yourself some time to become familiar
with it - or ask your soundman what he thinks of your
Reverb sound. We’re sure you’ll agree with us - this is
the sweetest, most natural Reverb found in any guitar
amp!
Again: because the two channels have very different gain structures, it is normal to experience a difference in Reverb levels when
changing between Inputs. Channel 1 will have noticeably more Reverb for a given setting than Channel 2. Simply adjust the REVERB
Control to compensate for the difference.
SPEAKER JACKS: These 1/4” jacks are the speaker outputs for the MARK I . One 8 Ohm and two 4 Ohm jacks are provided -
which make for optimum performance with any speaker combination. Your Boogie is capable of withstanding any impedance mis-
match without danger of damage - except that very low speaker impedance will cause the power tubes to wear out slightly faster. As
mentioned earlier under the 60 / 100 switch section of this manual - some mismatches deliver
desireable tonal coloration and feel. When two 8 Ohm speakers are in use, each speaker should
be connected to a 4 OHM SPEAKER JACK. (In this case, the total impedance load is 4 Ohms.)
More descriptions of mismatch combinations can be found in the 60 / 100 switch section of the
Front Panel instructions.
A Mesa/Boogie 4x12 cabinet comes standard (wired) at 8 Ohms. It has four 8 Ohm speakers
wired in series - parallel. No matter how unusual your speaker setup, it is always possible to get
good performance. If you need two 8 Ohm speaker jacks ( in order to run two 16 Ohm cabinets at
the same time ), you can use a “Y” box, daisy - chain the cabinets or go inside the amp chassis and rewire the speaker jacks so that
there are two 8’s and one 4 Ohm jack. You should then re - label the Panel to avoid confusion later.
Most of all - enjoy your Boogie! It should sound great in any situation. And it should last a lifetime with only moderate care and
maintenance. The MARK I thrives under rugged performance conditions and does not require any special “babying”. It will help you
to sound better, to play better and to enjoy your playing more. You will undoubtedly get rave reviews on your sound from wistful
admirers and find that your
MARK I out - guns anything around! Remember to dedicate a few licks to your favorite players of
yesteryear - in many cases the MARK I was their amplifier. This MARK I , however, was built for you! So grab your guitar and GO
FOR IT!