1
Unpacking and placement
Unpack your Nº20.6 Monaural Reference Amplifier and keep all
packing materials for future transport. Because of the weight of the
unit, handles are provided front and rear so two people may lift and
carry the amplifier comfortably and without risk of injury.
Carefully inspect the product for damage and flaws. If you discover
any, contact your Mark Levinson dealer immediately.
To get the best performance from the Nº20.6, speaker cables should
be as short as possible. Place the Nº20.6 as close to the loudspeakers
as is practical.
Place the Nº20.6 at least three feet away from the turntable and
preamplifier; otherwise, the Nº20.6 may induce hum in these sensitive
components.
The Nº20.6 may be placed in a cabinet or on a shelf, but adequate
ventilation must be provided to prevent overheating. The clearance
provided by the unit’s feet must be maintained to ensure unrestricted
air flow through the heatsinks and vents in the bottom of the chassis.
(Placing the Nº20.6 on carpeting, for example, may prevent adequate
ventilation.) Clearance above the unit must also be maintained to
allow air circulation and to prevent heat buildup.
The Nº20.6 incorporates thermal sensors located near each group of
output devices. If the heatsink temperature becomes excessive, these
sensors will shut off the amplifier before damage results. After a brief
cooling period, the amplifier can be reactivated via the front panel
switch. If this occurs regularly during normal use, it's an indication that
the ventilation provided for the amplifier is inadequate. If there's
adequate ventilation and the problem continues, see your Mark
Levinson dealer immediately.
This product doesn't comply with EIA rack-mount standards. A 19"
rack-mountable front plate is available from your Mark Levinson
dealer.
For custom installations and cabinetry, this information may be helpful:
■
All temperature measurements are made at the top of the
heatsink, 3.5" behind the front plate.
■
Normal heatsink temperature at idle after warmup, with
unrestricted airflow at 22
°
C (72
°
F) ambient temperature: 44
°
C
(111.2
°
F).
■
Maximum permissible heatsink temperature before thermal
protection is activated: 80
°
C (176
°
F).
To facilitate special installations and custom cabinetry, drawings are
included in this manual (see “Dimensions”).
For your protection, review “Important safety instructions”
before you install your Nº20.6.
Unpacking
Placement
Ventilation
Custom installations
PRECAUTION
Summary of Contents for Mark Levinson ?20.6
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