Di Earth Lift Switch; Send-Lo Pass, Full, Hi Pass Sockets (12 Band); Series/Parallel Switch (12 Band); Return-Left, Mono, Right/Mono Sockets (12 Band) - TRACE ELLIOT AH1000-12 Guide D'utilisation

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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