Owner`s manual

PAGE 5
SPEAKERS:
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Speaker cabinets may be 4, 8 or 16 Ohms and can vary from one manufacturer to another. If you are
not sure of the impedance rating of your cabinet, you may need to remove the cabinet’s rear panel in order to verify the impedance
rating of the speaker (s). Mesa/Boogie 4x12 and 4x10 cabinets come standard wired to 8 Ohms and are wired in series-parallel. No
matter how unusual your speaker setup, it is always possible to get good performance from your 20/20.
SLAVE A / B:
The 20/20 provides a pair of slave jacks that enable you to capture the sound of this magic little power section and
inject it directly into outboard effects processors or other larger power amplifiers for higher output at larger venues. In either of these
scenarios the 20/20 becomes a tone generator that enables you to achieve the sound of a small amp cranked, in a one space
rackable format. Due to space considerations, the output levels are preset at the slave output jacks to provide an optimum level when
the Front Panel VOLUME Controls are set to approximately 10:30, which is usually just past the onset of clip - depending on the
strength of the signal at the Inputs.
This predetermined level of the Slave jacks should be well matched to most applications and some control of the signal level is
possible by adjusting the Front Panel VOLUME Controls. If you have an application where you are using the 20/20 at either super
low or extremely high for fully clipped sounds, you can call us and ask for a Product Specialist and he can figure out a signal strength
resistor network for your individual needs and can send the parts to you for a technician in your area to install. Most likely though, by
working with the 20/20’s VOLUME Controls in conjunction with the input attenuators of the processor or power amp you are interfac-
ing with, a Slave level can be obtained that will work well for your situation. Please try this before calling us to modify your amp.
NOTE: WARNING ! - A load must be connected at all times to the Speaker Outputs when using the Slave jacks. If you intend to use
the 20/20 as a tone generator only and do not want to listen to the live speaker outputs, connect a load resistor with a rating of at least
40 watts (or greater if driven continuously into clip) and with a 4 or 8 Ohm impedance rating. Each channel must have a load resistor
connected to its proper speaker jacks. In most cases a speaker will deliver better sound and a tone you are more familiar with due
to the reactive nature of a speakers dynamic signature and natural compression. If you prefer this Slave sound, but don’t want to listen
to the live speaker simply put it in a box or hide it under the drum riser...etc.
REAR PANEL: (Continued)