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ES250 shown
ES SERIES
INSTALLATION AND OPERATION MANUAL
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CH 1-4
Each channel input section has two inputs:
XLR input – This is a balanced microphone input with an input sensitivity of 1.2mV.
RCA input – This is an unbalanced line level input. It has an input sensitivity of 160mV. The two RCA sockets are summed to
mono internally.
REC OUTPUT
The REC output is on unbalanced RCA connectors. The output level is 220mV into 10kΩ at rated output. The output is dual
mono.
NOTE: The output is not affected by the MASTER volume control or the BASS and TREBLE controls.
The output also does not receive the signal from the tone generator.
LINE OUTPUT
The LINE output is on a balanced XLR connector. The output level is 0.775V into 1kΩ at rated output.
NOTE:
The tone generator output will also be fed into the line output if activated.
When wiring the LINE output as unbalanced, Pin2 should be wired as hot and Pin1 should be wired as ground/ shield. Do not wire Pin3.
SPEAKER OUTPUT
Speaker connections are provided on screw terminals. 4Ω low impedance and 100V.
IMPORTANT: If you are using the 100V output you must connect the jumper link between 4Ω and OT-IN. (ES60 and ES120)
MINIMUM IMPEDANCE
ES60
ES120
ES250
DISTRIBUTED LINE OUTPUT
100V
166Ω
83Ω
40Ω
LOW IMPEDANCE OUTPUT
4Ω
4Ω
4Ω
NOTE: Only connect one output – either 4Ω or 100V. Do not connect 4Ω and 100V at the same time.
IEC MAINS INPUT SOCKET
This is a standard IEC 60320-C14 socket. It accepts a standard IEC mains cable, provided. The fuse drawer contains the
mains fuse and a spare. Consult the specification section for fuse ratings.
Always replace the fuse with one of the same value and type. Always disconnect power to the amplifier before replacing fuses.
PHANTOM POWER
12V phantom power is available for condenser or electret microphones on the XLR input when this switch is pushed down.
REAR PANEL
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