Tape OutpUt RCA style phono output corulectors provide a line level output with a maximum of 350mV into 1 0K 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 @ 200 ohms.
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 6, 5, 4, 3,2, & 1
respectively.
RCA Sockets For The Monaural Line Level Inputs. Line inputs 1,2,3, 4, & 5 have an input sensitivity of 75mV
@ 47K ohms. 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, & I respectively.
Other Features
TOng GgngfatOfS: 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 extemal 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:
o Evacuation Tone (to Australian Standard A52220.1.2)
o Alert Tone (to Australian Standard A52220.1.2)
o Bell Tone
r 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 I and 2 meaning that any signal on channels I and2 (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will automatically ramp back up to normal volume when the signal on channels 1 and/or 2 is no longer active.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. (Factory setting for VOX enabled is the
jumper on the middle and right pins).
Accessories:
Fuse Sizes: ACMRK: 19" rack mount kit
Mains, 240YAC:. 6 Amperes Slow Blow
DC: l0 Amperes Slow Blow
