ATC SCM12i PRO [3/7] D e s c r i p t i o n

ATC SCM12i PRO [3/7] D e s c r i p t i o n
1:Description
The SCM12 Pro is a high performance 2-way passive nearfield
monitor. The monitor is equipped with a "bi-wire" connection
panel to enable separate amplification of mid/bass and high
frequency drivers if required.
The SCM12i Pro is an install variant of the SCM12 Pro
featuring fixing points for wall/ceiling mounting, when partnered
with the appropriate bracket.
The acoustic performance of both SCM12 Pro and SCM12i Pro
models is identical.
2:Safety Warnings
Safety information for both SCM12/12i Pro models is as follows.
Please note: Before installation of the SCM12i Pro, Section 7
within this document MUST BE READ IN FULL.
1. Read instructions – all the safety and operating instructions
should be read before the appliance is operated.
2. Retain these instructions – the safety and operating
instructions should be retained for future reference.
3. Follow instructions – all operating and other instructions
should be followed.
4. Water and moisture - the appliance should not be exposed
to dripping or splashing and no objects such as vases, should
be placed on the appliance.
5. Heat – the appliance should be situated away from heat
sources such as radiators, stoves or other appliances that
produce heat.
6. Cleaning – the appliance should be cleaned only as
recommended by the manufacturer.
7. Servicing – the user should not attempt to service the
appliance beyond those measures described in the operating
instructions. All other servicing should be referred to
qualified service personnel.
3:Unpacking & Handling
n The SCM12 Pro and SCM12i Pro are heavy items and should
be handled with care. Unpacking is best carried out on the floor
or a large low table, with adequate open space around the
carton, preferably close to their final position.
n Open the carton and remove all loose items, leaving the
packing foam in place.
n Up-end the carton so the open end is facing down.
n Lift the carton off the contents (speaker & foam ‘end-caps’).
n Lift the upper foam end cap off.
n Lift each loudspeaker out of the foam end cap, remove from
the bag and position in the listening/control room.
4:Monitor Placement
The subjective performance of any monitor loudspeaker will be
influenced by the acoustic character of the room in which it is
used and its position within the room. Most often, monitors are
installed in rooms which are comfortable to sit and talk in.
A mixture of carpets, curtains and soft furnishings will help
ensure that the middle and high frequencies are reasonably well
controlled. There may, however, be low frequency problems;
either too much or too little bass. To minimise low frequency
problems:
n Try to position speakers away from walls
n Try to position speakers away from corners
n Try not to position speakers exactly 1/4, 1/3, 1/2, 2/3, 3/4
between parallel walls
In professional installations, try to avoid placing the loudspeakers
on the console/desk meter bridge. Typically, this compromises
the frequency balance of the loudspeaker, especially in the lower
mid range. Mounting the speakers on stands behind the
console/desk usually gives better results.
If the balance is bass light the monitors can be moved
towards the back walls. If the balance is bass heavy try moving
the monitors away from walls/corners.
Stereo Listening.
The loudspeakers should be positioned so they form an
equilateral triangle with the listening position (see Fig.1).
Loudspeaker stand height should be chosen so the acoustic axis
is at ear level (see Fig. 2). For most seating positions in
professional scenarios, a suitable stand would be 900 -1000mm
or 35
1
/2˝- 39
3
/4˝ tall. Suitable stands should be heavy, rigid and
resonance free.
If the loudspeakers have to be positioned so the acoustic axis
is above ear level, they can be tilted downwards.
For surround positioning please see overleaf.
30°
3
distance x
distance y
distance z
distance x = distance y = distance z
Loudspeaker Positioning - Stereo
Fig. 1
Stereo Loudspeaker Positioning
Fig. 2
Acoustic Axis
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