SPL Track One Channel Strip - Manual (Page 9)

9 Track One
VOLTAGE
The rear panel VOLTAGE selector sets the local line voltage (115 V position: 110-120 volts/6o Hz,
230 V position: 220-240 volts/50 Hz). The diagram to the right shows the correct switch posi-
tion for 230 V power supply.
BEFORE you connect electrical power make sure that the VOLTAGE selector setting reflects
the correct local power line voltage!
Power connection and fuses
Connect the power cord to the rear power socket. Transformer, power cord and case connec-
tion conform to VDE, UL and CSA requirements.
The power socket also houses the fuse. It is accessible from outside and placed right behind
the flap below the socket. Fuse ratings are 315 mA slow blow (230 volts) or 630 mA slow blow
(115 volts).
GND Lift
The rear panel GND LIFT switch eliminates hum by separating the internal ground from the
unit’s housing ground. Hum can, for example, result when this unit’s housing has a common
ground connection with other devices that might have a different ground potential. The
switch is usually deactivated to retain the shielding of the housing.
MIC IN
You can connect any kind of microphone to the MIC IN socket (dynamic, condenser, tube,
and ribbon microphones). 48 volts phantom power, which is required for some microphones,
can be activated with the 48V switch on the front panel. Please read the important notes
in chapters “48 V” and “Activating phantom power” on page 11. The microphone input can
also be equipped with an optional input transformer (see page 22, “Information on I/O trans-
formers”).
INSTR./LINE IN
Use the balanced INSTR./LINE IN socket for high-level line or instrument signals.
Line signals usually have impedances lower than 1 kOhm, examples are sources like D/A
converters, synthesizers or samplers. Instrument signals, such as e-guitars and basses,
acoustic guitars with pick-ups and so on, are high impedance sources (above 1 kOhm).
The maximum input level of the INSTR./LINE IN is +28 dBu in LINE mode and +12 dBu in INSTR.
mode.
INSTR./LINE switch
This switch serves to match to levels and impedances of line and instrument signals. Press
the switch if you have connected line signals, do not press the switch when you connect
instrument signals.
Sockets and switches
Rear Panel
VOLTAGE | FUSE
230 V ~50Hz
Fuse: 315 m A
115 V ~60Hz
Fuse: 630 m A