Non default option 2A.
This will turn the Instrument thru (jack 1) into a summing input jack. It
will then function the same as the summing in (jack 2). This will sum
after the main input stage with whatever is plugged into the instrument
input (jack 8), and the summing in (jack 2). You can also configure the
buffered out (jack 3) jack, as a summing input but we’ll get to that later.
Look at the block diagram to get a better idea of where this summing
junction is. The input impedance here is about 50k ohms suitable for
active devices like keyboards or active pickups. The level control will
control the instrument in level but not the summing in levels. Theses
summing inputs were intended for someone who might along with there
main instrument use a keyboard (mono or stereo) or a theremin or bass
pedals ala John Paul Jones. Having your main instrument as well as
your other occasional instruments to feed the instrument amp with the
PIPs instrument level hi Z main output and the balanced main output
to hit the mixer seems tidy and saves you the expense of extra DIs and
more mic cables. Besides all that the summing quality is super hi fidel-
ity! #30 remove jumper and #31 jumper 3 & 4 / jumper installed
on #35 and on 35X / on #75 jumper 1&3.
Jumpers #112, #128, and #129, determine the functionality of the
buffered out (jack 3).
The default function for this jack is as follows:
The buffered out (jack 3) is tapped after the main input stage, pre the
level control. This can be used for a line driver with 6dB of gain in the
mid z or hi z position, useful when a long guitar cord is used to eliminate
high end loss (when using passive pickups) or for feeding a tuner. #112
jumper 1&3 / #128 jumper 1&3 / on #129 jumper 1&3.
Non default option 1B
The buffered out (jack 3) is tapped after the main input stage as in the default
setting, but post the level control. #112 jumper 1&3 / #128 jumper 2&3 / on
#129 jumper 1&3.
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JUMPER LOCATIONS
