User manual AUSTRALIAN MONITOR SA120

[. . . ] Adjusting the bass control in a clockwise direction will provide up to +12 dB of bass boost @ 100 Hz. Adjusting the bass control in a counter-clockwise direction will provide up to -12 dB of bass cut @ 100 Hz. Treble Control Setting this control in the centre "zero" position will give an overall flat treble response to the output of the amplifier. Adjusting the treble control in a clockwise direction will provide up to +9 dB of treble boost @ 10 kHz. Adjusting the treble control in a counter-clockwise direction will provide up -9 dB of treble cut at 10 kHz. Master Output Control This control adjusts the overall output level of the amplifier depending on the levels set for the individual input mix channels as detailed above. [. . . ] Sleeve = Ground. Tape Output Two RCA style output connectors are provided for a line level tape output. A maximum level of 350mV into 10K ohms is provided 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. Line Output A male XLR, balanced transformer isolated output is provided to connect to additional power amplifiers. A maximum output level of 700mV makes it suitable for driving most power amplifiers or similar devices. Pin 3 = Active Negative (-). Line Inputs Six pairs of RCA input connectors accept unbalanced line or auxiliary inputs for channels 1 through 6. The pairs are provided per channel to allow simple connection of stereo program sources which are summed to mono once connected. Channel 6 accepts higher level inputs such as a CD player or DVD player. For best gain structure, always connect high level program sources to input 6. Microphone Inputs Six female XLR accept 200 ohm balanced or unbalanced microphone inputs. If using unbalanced microphones, ensure that phantom power (see below) is switched off, otherwise damage to the microphones is possible. Phantom Power 18 Volts DC phantom power is provided for all microphone inputs. An internal on/off switch can be found on the circuit board PCB6177. The factory setting is for phantom power to be switched on so this switch can be used to disconnect phantom power (from all six inputs) if required. It is necessary to disconnect the power cord and remove the lid from the amplifier before operating this switch. Tone Generator Four separate tones are available on the optional ATC5488 tone generator board. This internally mounted PCB is easily fitted and plugs directly into a socket provided on the internal circuit board PCB6178. Please follow the instructions supplied with the tone generator. When any tone from the ATC5488 is activated, all inputs, except for input 1, will automatically mute. Tones available on the ATC5488 tone generator board are: Evacuation Tone (to Australian Standard AS2220. 1. 2) Alert Tone (to Australian Standard AS2220. 1. 2) Bell Tone Pre Announce Chime Muting Modules Two separate VOX muting modules are available for the SA series amplifiers. They can be easily fitted by a qualified installer or technican. The modules plug directly into a socket provided on the internal circuit board PCB6178. The two muting modules are: TX3014 - Provides two levels of muting with the main priority for input one, which mutes all other inputs and secondary priority for channel two, which mutes all inputs except for input one. TX3010 - Provides single muting from channel one only. When activated from signal on input one, all other channels are muted. Important Safety Information 1. Save the carton and packing material even if the equipment has arrived in good condition. [. . . ] If the unit is used in an extremely dusty or smoky environment, the unit should be periodically "blown free" of foreign matter. Removing the cover will expose you to potentially dangerous voltages. There are no user serviceable parts inside. Do not drive the inputs with a signal level greater than that required to drive equipment to full output. [. . . ]