AUSTRALIAN MONITOR AMIS120XL Series, Руководство по обслуживанию

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The balanced XLR line level output provides a maximum of 700mV to allow for the connection of up to 6
power amplifiers. Pin connections are: pin 1-earth; pin 2-signal (hot +); pin 3-signal (cold -).
The output is electronically balanced with an inverting op-amp and buffered with voltage follower op
amps. Neither hot nor cold output should be grounded when connecting as unbalanced.
Tape Output
Dual RCA output connectors provide a line level output with a maximum of 350mV into 10k Ohms. This
output is sourced before the master gain control so the tape output level is not influenced by the operation
of the master gain control.
Phantom Power
The 15 volts DC phantom power to all microphone inputs XLR’s is individually switchable by Dip switch
3. Do not plug an unbalanced microphone in any amplifier or mixer when phantom power is switched on.
The phantom voltage is connected through 4k7 1/4W resistors. The maximum current draw available per
microphone is approximately 3mA.
Microphone Inputs
All four inputs are dual mic/line with microphone inputs being via a 3 pin XLR connector per channel. The
mic input sensitivity is 1mV @ 200 ohms. Pin connections are: pin 1-earth; pin 2-signal (hot +); pin 3-
signal (cold -). Phantom power of +15 volts is switchable on all microphone inputs. Reading from left to
right across the rear panel, the connections are for inputs 8, 7, 6, 5 on the bottom and 4, 3, 2, & 1 on the top.
Line Inputs
Line inputs 1, 2, 3, 4, 5, 6, 7, & 8 have an input sensitivity of 180mV @ 100K ohms with switchable
attentuation. Reading from left to right across the rear panel, the connections are for inputs 8, 7, 6, 5 on the
bottom and 4, 3, 2, & 1 on the top.
Dip Switches
Dip Switch 1 off, 2 off - 180mV at 100K ohm
Dip Switch 1on, 2 off - 9dB pad (cut)
Dip Switch 1off, 2 on - 12dB pad (cut)
Dip Switch 1on, 2 on - 15dB pad (cut)
Dip Switch 3 on - Phantom Power On
[600 Ohm Telephone Input] (115V version)
The 600 ohm transformer balanced Telephone Input is summed with input 2 through 100k ohms.
The input sensitivity is 150mV (driving the amp to full power)
Insert Point
The Insert Point is located electronically after the master volume pot and before the balancing circuit for
the power amp and line output.
The Insert Point is a 3 conductor (Tip, Ring, Sleeve) phone socket which accepts a standard stereo 6.35mm
(1/4”) jack. The connections are:
Tip
Amplifier in.
Ring Mix Output.
Sleeve Ground