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When you first begin to play your speakers, they
will sound a bit bass shy. This is due to the high
quality, long-life components used in the drivers.
Allow approximately 72 hours of break-in at 90
dB (moderate listening levels) before any critical
listening.
Break-in
sPeaker PLaCement
Achieving Superior Imaging
These MartinLogan in-ceiling speakers offer superb
imaging and flexible placement in nearly any loca-
tion. However, for best performance and imaging
place speakers equidistant from one another and
avoid physical obstructions between the speaker
and primary listening position.
Balancing Hard vs. Soft Surfaces Improves High-
and Mid-Frequency Performance
Rooms that are “over damped” with carpeting,
drapes, and other sound absorbers can cause
your system to sound dull and lifeless. On the other
hand, rooms can have so many hard surfaces that
the system sounds like a gymnasium. Experiment
by adding or removing soft surfaces until you find
a mix that sounds good to you.
Choosing a Mounting Location
Install the Helos 12 and Helos 22 between ceiling
joists. Be careful to avoid electrical wires behind the
wall and ceiling surfaces.
Balancing Bass Output
Corner placement of these speakers will reinforce
their bass output. If you require balanced output
across the entire audio spectrum avoid mounting
these speakers in a corner.
When choosing placement follow these simple tips:
• Place a minimum of 12” (30cm) from any
wall corner.
• Place front and center channels equidistant
between 10–14 feet (3–4.3m) from the lis-
tening position.
•
Orient the tweeter towards the listening position.
Figure 5. Helos 12: Adding a center channel.Figure 4. Helos 12: 2-channel installation.
heLos 12 PLaCement