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To re-synchronize the switching simply turn the unit off for 5 seconds and then back on. Both the amplifier
and footcontroller will power up in the normal default state of PRE-SHAPE on, all other functions off.
The 12 Band units have been designed with two EXTERNAL CONTROL sockets. These make it possible to
use two footcontrollers, either of which can control the amplifier. This is useful if performing on a large stage
where each footcontroller can be placed in a different location for the performer's convenience. Alternatively,
one of the controllers could be placed on stage as normal and the other placed at the side of the stage to enable
a technician to control the musician's amplifier if necessary. Again, this is useful on particularly large stages.
Another use for both sockets is if two amplifiers are being used. In this scenario the two amplifiers can be
controlled by one footcontroller by connecting the spare EXTERNAL CONTROL socket on the first unit to
one of the sockets on the second.
(25) DI EARTH LIFT switch
Pressing this switch in will disconnect the earth/ground connection from pin 1 on the DI output XLR
socket(s).
Usually this should be left in the out position however there may be certain situations when connecting from
the DI socket(s) to another device that a hum is produced due to an earth/ground loop. If this happens then
pressing the EARTH LIFT switch in should eliminate the problem.
EFFECTS LOOPS (12 Band)
(26) SEND – LO PASS, FULL, HI PASS sockets (12 Band)
These are all SEND outputs within the EFFECTS LOOPS section and are active at all times.
The FULL SEND will output the full frequency range of the signal. The LO PASS SEND will output only the
low frequencies and the HI PASS SEND will output only the high frequencies. The filters have been designed
so that when the LO PASS and HI PASS signals are reconstructed they will be identical in both frequency
response and phase.
(27) SERIES / PARALLEL switch (12 Band)
This configures the effects loops to be either SERIES, with the switch in where the whole signal passes
through the effects loop, out of the sends and back in the returns, or PARALLEL with the switch out, where
the signal is split, one part going through the effects loop and the other, dry, signal being unprocessed and
mixed in with the effected signal. The PARALLEL setting ensures that a part of the overall signal remains
pure and unaffected.
If the PARALLEL setting is chosen it is recommended that the dry signal in the effects unit is turned to
minimum if accessible.
(28) RETURN – LEFT, MONO, RIGHT/MONO sockets (12 Band)
These are all RETURN inputs within the EFFECTS LOOPS section.
The MONO socket will route the signal through both channels of the rest of the preamp.
The LEFT socket will route the signal to the left channel.
The RIGHT/MONO socket will route the signal to the right channel if the LEFT socket is also in use, or it
will route the signal through both channels, i.e. in mono, if the LEFT socket is not used.
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