Hill Audio IMA-400 V2, User Manual

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Functional Description
The IMA-400V2(B) is a combination of a triple-microphone & music mixer, a media player, and a
stereo low impedance power amplifier. Packed in a rugged 19’’ | 2U case and fitted with forced fan
cooling, it’s a comprehensive and reliable centre piece for commercial sound systems in retail and
hospitality.
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AC inlet and fuse holder. Use the supplied AC cord to connect the unit to AC mains. Make sure
voltage and frequency stated and set on the unit comply with your local AC supply. The fuse
can be accessed by the small drawer at the AC inlet. To change the fuse, unplug the AC cord
first, pull out the fuse drawer and replace the fuse ONLY with a fuse of SAME voltage and
rating. If the fuse blows again after replacement, hand over the unit to qualified service person-
nel.
Speaker Outputs. Connect your speakers to these outputs. Note that these are low-impedance
outputs, not suitable to connect speaker with built-in 100V line transformers. Make sure that
the speakers or any combination of speakers have a minimum nominal impdeance of 4 Ohms.
Avoid any short circuits between the plus and minus poles of the outputs, and be aware that
these outputs may carry voltages which represent a risk of electric shock. Consequently, only
connect your speakers when the unit is switched off.
Output Mute connector. This is a terminal block input which allows to remotely mute all output
signals (Speakers, PreAmp) by simply shortening the contacts.
Emergency input. This is an auto-sensing, balanced terminal block input which allows the
connection to an emergency evacuation system. Once a signal is present on this input, all
output signals (Main, Zone) will be muted and the emergency message/signal from this input
will become audible instead. Please note that the internal microphones may or may not be
included in this muting process , depending on the setting of Jumper J300 (see section “con-
figuration setup”) and may hence not be used while an emergency message is broadcasted.
Also note that the emergency input will have effect on the speaker output (20 or 21); whether
it also affects the Stereo Link (SL) preamp output (15) depends on the setting of jumpers J21
and J22 (see chapter “configuration settings”)
Emergency volume control. This control allows to set the level with which the signal fed into the
emergency input (4) will be replayed on the speakers (20 or 21) and the Stereo Link (SL)
preamp output (15).
Maximum Volume control for MAIN speaker output (20 or 21). Allows to limit the maximum
output volume which the user can set with the front-panel MAIN volume control (36).
Remote Enable switch. Pressing these switches enables the remote volume control input (8),
and disables the internal main volume control (36).
Volume remote control input. This 3.5mm terminal block input is for connecting an external
passive wall control panel of the ZCP-10 type. See chapter “remote volume control” for more
information. Note that this input is only enabled when the remote-enable switch is pressed (7).
Record output. This is an unbalanced stereo output carrying the same signal as the main
output, but not influenced by the main volume control (36). This is normally used for recording
the output to an external tape, CD or memory device.
Preamp Output. This is terminal block which carries a balanced line level signal. The signal at
this output is determined by the zone controls (39) and (40) and can be the same as the main
output, or can be selected via switch (39) to be the Line1 or Line2 input signal.
USER MANUAL - IMA400V2 INSTALLATION MIXING AMPLIFIER
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