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Effects Send and Return
The GP7 preamp is provided with a serial effects loop and the sockets for this are located
on the front panel.
The EFFECTS SEND socket is for linking the preamp sound into your effects unit and the
EFFECTS RETURN socket for returning the signal back to the preamp.
As this is a SERIAL effects loop then you will need to adjust the balance of direct to
effects sound within your effects unit (i.e. dry/wet mix).
The signal path through the preamp is only broken when a jack plug is inserted into the
EFFECTS RETURN socket, so the EFFECTS SEND signal may be used as a pre master
volume LINE OUT socket or connected to a tuner. This will allow silent tuning by turning
the OUTPUT LEVEL to zero, tuning up and returning the OUTPUT LEVEL control back to
its original setting.
The EFFECTS SEND socket is located after all EQ and after the compressors.
Balanced DI
A balanced DI output is provided on the GP7 preamp for direct connection to a balanced
'Mic' input on a mixing desk. This may be used for either Direct Injection of the bass into
a PA system or for recording purposes.
The balanced DI is provided on a standard Male XLR socket located on the front panel.
The signal from the preamp fed to this output socket is selectable between PRE EQ and
POST EQ.
PRE EQ takes its signal from before the graphic equalizer but after the mid pre shape.
POST EQ takes its signal from after all equalisation, after the compressors, and after the
effects loop, but before the output level control.
The level of the DI output is fixed at a suitable level to suit the low impedance 'Mic'
input on a mixing desk. This level is dependant on the setting of the INPUT GAIN control
and it is important to have this set correctly (see INPUT GAIN section).
Power LED
This LED indicates when the unit is connected to the mains supply and switched on.
Line Output
The LINE OUTPUT jack socket can be used for connection to further power amplifiers to
allow the building of a higher powered bass system. The signal on this socket is taken
from after the OUTPUT LEVEL control so that a single control will increase or decrease
the volume of the entire system simultaneously.
The LINE OUT socket is configured such that it may also be used as a LINE INPUT. This
may be used to interconnect or LINK two preamps together so that both preamps will
drive both sets of power amplifiers and speakers with the volume of each preamp still
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