User manual AUSTRALIAN MONITOR ACM250

[. . . ] Adjusting the mid control in a counter-clockwise direction will provide up to -12 dB of mid cut @ 600 Hz. Treble Control 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 @ 10 kHz. Master Output Control The Master level pot controls the overall output level of the amplifier depending on the levels set for the individual input channels as detailed above. Start with the control set to level 0 and turn clockwise until the desired output level of the amplifier is reached. Power Switch This switch controls the switching of AC power to the amplifier. [. . . ] Input 6 has an input sensitivity of 300mV @ 47K ohms making it suitable for high level inputs such as a CD player. Reading from left to right across the rear panel, the connections are for inputs 6, 5, 4, 3, 2, & 1 respectively. Other Features Tone Generator Four separate tones are available from the in-built tone generator board. All four tones can be activated individually via a contact closure connected to the screw terminals on the rear of the amplifier. To activate the bell chime for example, just run a pair of wires from the Tone generator common and the Bell terminal to an external switch. Activating the switch, or closing the pair of wires, will activate the bell. When any tone is activated, all inputs (except for inputs one and two) will automatically mute. To adjust the level of the tone generator, disconnect the power lead, remove the amplifier lid and locate the pot labeled R6. (located behind the Bass adjustment pot). This pot adjusts the level for all 4 tones. Tones available on the ACM250 include: Evacuation Tone (to Australian Standard AS2220. 1. 2) Alert Tone (to Australian Standard AS2220. 1. 2) Bell Tone Pre-Announce Chime Muting A VOX muting card is installed in the ACM250. This feature provides automatic muting of some channels when others are active. 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 1 and 2 (mic or line) will mute channels 3, 4, 5 & 6. The muted channels will automatically ramp back up to normal volume when the signal on channels 1 and/or 2 is no longer active.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. To disable the VOX muting, disconnect the mains power lead and remove the lid of the amplifier. Looking down from the front of the amplifier, a three position jumper (labeled JP2) is located just to the left and behind the level pot for channel 1. To disable VOX muting, move the jumper to the middle and left pins. (The factory setting is with VOX enabled with the jumper on the middle and right pins). Fuse Sizes Mains, 240 VAC: 6 Amperes Slow Blow DC: 10 Amperes Slow Blow Important Safety Information 1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. Read all documentation before operating your equipment. [. . . ] The power cord of equipment should be unplugged from the outlet when left unused for a long period of time. Service Information Equipment should be serviced by qualified service personnel when: A. The power supply cord or the plug has been damaged. Objects have fallen, or liquid has been spilled into the equipment C. [. . . ]