User manual AUDIO TELEX ACM120

[. . . ] Adjusting the bass control in a counter-clockwise direction will provide up to -12 dB of bass cut @ 100 Hz. Tfeble GOntfOl: Setting this control in the centre position will give an overall flat treble response. Adjusting the treble control in a clockwise direction will provide up to 9 dB of treble boost @ 10kHz. Adjusting the treble control in a counter-clockwise direction will provide up to -9 dB of treble cut @ l0kJtz. Master Output Control: This controls the overall output level of the amplifier depending on the levels set for rhe individual input channels as detailed above. Start with the control set to level 0 and tum clockwise until the desired output level of the amplifier is reached. Page Chime Button: This allows the user to disable or enable the Pre-Announce Chime. [. . . ] Power consumption is 125 watts for the ACM60 and 250 watts the ACMI20. Please ensure that the mains power cord is disconnected before attempting to check or replace this fuse. Direct OUtput Terminal Strip: The screw terminals on the left hand side of the strip allow access to the direct speaker outputs of the amplifier. The screw terminals on the right hand side are for activation of the in-built 4 tone generator. Reading from left to right the terminals are: o Low Impedance Common (use with 4 or 8 ohms) o 4 Ohms (not available on ACM60) o r t r 'o r r . o 8 Ohms Constant Voltage Common (use with 70v or l00v) 70 Volt Line 100 Volt Line Spare Tone Generator Common (use with one of the 4 tones listed below) Pre-Announce Chime Alert Tone Bell Chime Evacuation Tone less Note: The minimum impedance (or maximum load) at 100 Volt line should be no less than 80 Ohms for the ACMI2O and no than 160 Ohms for the ACM60. Switched Outputs Terminal Strip: Reading from left to right, these screw terminal pairs correspond to the switched 100 volt line outputs and are numbered 6 through I as indicated on the front panel of the amplifier. For each pair, the left hand terminal is the 100 volt output and the right hand terminal is the common. Phantom Power Button: This button enables or disables the 18 volts DC phantom power which is available on all microphone inputs (XLR's). The "in" position indicates that phantom power is on for all mics. The "out" position means that phantom power is switched offfor all mics. Phantom power is required for electret condenser microphones which 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 that they are balanced. Do not plug an unbalanced microphone in 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 connection to up to 6 power amplifiers. Simply run a balanced cable from the line out of the ACM60 or ACM120 to the line input of the power amplifier. Pin connections are: pin #l-earth; pin #2-signal (high, +); pin #3-signal (low, -). Tape Output RCA style phono output connectors provide a line level output with a maximum of 350mV into 10K Ohms which is ideal for a 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. Active Balanced, XLR Sockets For The Microphone lnputs. The mic input sensitivity is lmv Pin connections are: pin #l-earth; pin #2-signal (high, +); pin #3-signal (low, -). Phantom power of +18 volts is available on all microphone inputs. Reading from left to right across the rear panel, the connection are for microphone inputs 4, 3, 2, & 1 respectively. @ 200 ohms. RCA Sockets For The Monaural Line Level lnputs. Line inputs 1, 2 &3 have an input sensitivity of 75mv @47K ohms. [. . . ] It is normally used so that a paging microphone can have priority (by muting) over background music. VOX muting is available from channels 1 and 2 meaning that any signal on channels I and 2 (mic or line) will mute charnels 3 & 4. The muted channels will automatically ramp back up to normal volume when the signal on channels 1 and/or 2 is no longer active. The amplifier ships with the VOX muting function enabled. [. . . ]