REAR PANEL: (Continued)
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 | |||||||||||
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| Control compress the sound and enhance the more vocal like |
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| qualities of single notes. This control can also produce a fatter, |
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| Presence settings produce the richest, roundest lead sounds. | |
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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
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| that is smooth and not at all “springy”. You may at first |
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| be unaccustomed to the clarity and the lack of typical |
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| the sweetest, most natural Reverb found in any guitar | |
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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
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| be connected to a 4 OHM SPEAKER JACK. (In this case, the total impedance load is 4 Ohms.) |
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A Mesa/Boogie 4x12 cabinet comes standard (wired) at 8 Ohms. It has four 8 Ohm speakers
SPKRSwired 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!
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