Vax M-9000 - Manual (Page 17)

17
33. Speaker output terminal
Connects speakers of which total impedance
matches the amplifier's output impedance.
(Refer to
p.100 "Speaker Output Terminal
Connections." )
34. AC inlet
Connects the supplied power cord.
35. RS-232C serial communication port
Connector for communications with a personal
computer or control equipment.
36. Functional earth terminal
Hum noise may be generated when external
equipment is connected to the unit. Connecting
this terminal to the functional earth terminal of
the external equipment may reduce the hum
noise.
Note: This terminal is not for protective earth.
37. Mode switch
Selects the unit's operation mode (either matrix
or mixer).
The switch is factory-preset to the matrix mode.
38. Control-I/O connection terminal
Connect a 10 k Ω (linear taper) variable resistor
or input the DC voltage of 0 to +10 V to the
remote volume control terminals (REMT VOL 1
and 2) when remotely adjusting the volume.
To perform other remote control operation,
connect the ZM-9001 or ZM-9002 Zone
Manager.
Input and output terminals (IN and OUT) are
used to change the unit's internal status or output
internal status data to external equipment after
having received various control signals.
39. Blank panel (accessory)
Attach the blank panels to open slots.
40. Module slots
900 Series or 9000 Series modules can be
inserted into these slots.
(Refer to
p. 94 "MODULE INSTALLATION." )
41. Preamplifier output
and Power amplifier input terminals
[M-9000]
There are 2 preamplifier output terminals.
For unbalanced connection, connect the unit's Hot
and Earth terminals to the connected equipment's
Signal and GND terminals, respectively. (Keep the
unit's Cold terminal free.)
0 dB, 600
Ω, balanced type
[A-9060DH/9120DH/9120DL]
There are 2 preamplifier output terminals and 2
power amplifier input terminals.
Connecting a plug to the power amplifier input
terminal internally disconnects the preamplifier
section from the power amplifier section.
Both terminals: 0 dB, 300
Ω, unbalanced type
[A-9060S/9120S/9240SH]
There are 2 preamplifier output terminals and 1
power amplifier input terminal.
Connecting a plug to the power amplifier input
terminal internally disconnects the preamplifier
section 1 from the power amplifier section.
To make unbalanced connection to the
preamplifier output 2, connect the output's Hot and
Earth terminals to the external equipment's Signal
and GND (or Earth) terminals, respectively.
(Leave the output's Cold terminal open.)
Preamplifier output 1: 0 dB, 300
Ω, unbalanced
Preamplifier output 2: 0 dB, 600 Ω, balanced