User manual AUSTRALIAN MONITOR AMIS60

[. . . ] Clever Features, Contactor Friendly Operating Manual AMIS60, 60w Mixer Amplifier & AMIS120, 120w Mixer Amplifier Product Description The AMIS60 and AMIS120 mixer amplifiers are designed for commercial installations. Both models operate on 110 VAC, 60Hz or 24 VDC, and may be desk or rack mounted (rack mount kit supplied fitted). Both amplifiers incorporate a 6 zone 70 volt line speaker zone selector with "All Call". The AMIS60 will deliver 60 watts into a load of 8 ohms, 25 volt or 70 volt line. [. . . ] The "in" position indicates that phantom power is `on' for all mics. The "out" position means that phantom power is switched `off' for all mics. Phantom power is required for electret condenser microphones that require DC power to operate. While some of these microphones can operate from an internal battery, having phantom power available on the amplifier eliminates the need to regularly change batteries in the microphone. While phantom power is not required for the more common Dynamic microphones, it will not damage them providing they are balanced. Do not plug an unbalanced microphone in to any amplifier or mixer when phantom power is switched `on'. Line Output The balanced XLR line level output provides a maximum of 700mV to allow for the connection of up to 6 power amplifiers. Simply run a balanced cable from the line out of the AMIS60 or AMIS120 to the line input of the power amplifier. Pin connections are: pin #1-earth; pin #2-signal (high, +); pin #3-signal (low, -). Tape Output Dual RCA output connectors provide a line level output with a maximum of 350mV into 10K Ohms which is ideal for connection to most standard tape recorders. This output is sourced before the master gain control and as such, the tape output level is not influenced by the operation of the master gain control. 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 (high, +); pin #3-signal (low, -). Phantom power of +15 volts is available on all microphone inputs. Reading from left to right across the rear panel, the inputs are 4, 3, 2, & 1. Line Inputs All four inputs are dual mic/line with line/auxiliary inputs being via dual RCA connectors per channel. Line inputs 1, 2 & 3 have an input sensitivity of 150mV @ 100K ohms. Input 4 has an input sensitivity of 300mV @ 220K ohms making it suitable for high level inputs such as a CD player. Reading from left to right across the rear panel, the inputs are 4, 3, 2, & 1. Insert Point The AMIS60 & AMIS120 include an Insert Point to allow for connection of signal processors such as equalisers, compressors or Feedback Exterminators. The Insert Point is located (electronically) between the mixer and power amplifier sections of the AMIS60 &AMIS120. It allows for the "mixed" output of the amplifier to be processed externally and then returned to the power amplifier section of the AMIS60 & AMIS120. The Insert Point is a 3 conductor (Tip, Ring, Sleeve) socket which accepts a standard stereo 6. 35mm (1/4") jack. The one jack allows for signals to be "sent" to the processor and then "returned" to the power amplifier. This is the return signal from the processor Ring Mix Output. This is the signal from the mixer stage which is to be sent to the processor Sleeve This is the ground connection When an external processor is used via the insert point, it only affects the power amplifier section of the AMIS60 &AMIS120. [. . . ] Damage caused by connection to improper AC voltage is not covered by any warranty. Have gain controls on amplifiers turned down during power-up to prevent speaker damage if there are high signal levels at the inputs. Power down & disconnect units from mains voltage before making connections. Never hold a power switch in the "ON" position if it won't stay there itself! [. . . ]