SPL Channel One 2950, Руководство пользователя

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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 position for 230 V power supply.
BEFORE you connect electrical power make sure that the VOLTAGE SELECTOR setting refl ects
the correct local power line voltage!
MAINS INPUT – power connection and fuses
Connect the power cord to the rear MAINS INPUT socket. Transformer, power cord and case
connection conform to VDE, UL and CSA requirements.
The MAINS INPUT socket also houses the fuse. It is accessible from outside and placed right
behind the fl ap 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 29, “Information on I/O trans-
formers”).
LINE IN
Use the balanced LINE IN socket for high-level signals with impedances lower than 1 kOhm,
e. g. D/A converters, synthesizers or samplers. We recommend connection to a patchbay for
easier access.
The maximum input level of the LINE IN is +22 dBu.
High impedance sources (above 1 kOhm), such as e-guitars and basses, acoustic guitars with
pick-ups and so on, must be connected to the INSTRUMENT input.
IMPORTANT: The line input is deactivated if the instrument input is in use.
INSERT
The balanced INSERT connectors (SEND and RETURN) are used to integrate further units into
the signal path of the Channel One. The SEND connector is placed behind the de-esser, the
RETURN connector is located in front of the compressor. This also allows to record the pre-
amplifi er signal via the SEND connector while another input signal can be fed into the Channel
One’s compressor or EQ sections for further processing.
GND LIFT
GND LIFT
GND
GN D L IFT
MIC IN
LINE IN
LIN E IN
TUBE PREAMP INPUTS
TU BE P RE AM P I NP UT S
MA IN S I NP UT
MAINS INPUT
MIC IN
LINE IN
LIN E IN
TUBE PREAMP INPUTS
TU BE P RE AM P I NP UT S
230V ~50Hz
Fuse: 315 m A slow
115V ~60Hz
Fuse: 630 m A slow
VO LTA GE | FU SE
VOLTAGE | FUSE
SEND
SEN D
RETURN
RET UR N
INSERT
IN SE RT
9
Channel One
Sockets and switches
Rear Panel