21
Installation Manual
Model M6400, M6800
THE DIRECTOR
™
Ventilation
Ventilation
This may be as good a time as any to have
“the talk” about ventilation. The Director
M6400 and M6800 feature cool-running
efficient switch mode power supplies and
Class D amplifiers, and they are equipped
with thermally controlled fans. They are
still 16 channel amplifiers, and therefore
require plenty of good ventilation to
properly cool.
Please be advised that no more
than 4 Director models may be
stacked together. Any more than
that, then a rack space above and
below is required for adequate
ventilation.
Review the heat load specifica-
tions and ensure that your rack
room meets these requirements.
If the amplifier should overheat, a thermal
sensor will put it into standby mode,
allowing the heatsink to cool down.
Once the amplifier has cooled to a safe
operating temperature, the amplifier will
reactivate. If this occurs often, identify the
cause of the problem and take corrective
action, for example:
Provide additional ventilation
Do not install in a sealed location
with limited or no airflow
Install a fan in the rack
Make sure that the amplifiers are not
overloaded with speaker impedances
below the recommended minimum
Check that there are no short circuits
in the speaker cables or speakers.
Note: Each zone will shut off inde-
pendently when a short circuit is
detected.
1U
1U
Ideal Spacing 1U rack space or more
above and below each pair
1U
1U
1U
No more than four units can be stacked
without a rack space between them.
Allow 1U rack space or more above and
below each stack of four.
