1
Unpacking and placement
Unpack your Nº29 amplifier and keep all packing materials for future
transport.
To avoid damaging the connectors on input cables attached to
the rear panel, NEVER rest the Nº29 on the rear panel, and
NEVER tip it back in a way that would put stress on these
connectors.
Carefully inspect your Nº29 for damage and flaws. If you find any, see
your Mark Levinson dealer immediately.
To keep speaker cables as short as possible, place the Nº29 as close to
the loudspeakers as practical.
Place the Nº29 at least three feet from the turntable and preamplifier.
Otherwise, the Nº29 may induce hum into these sensitive components.
The Nº29 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 across the bottom of the chassis. (Placing the Nº29 on
carpeting, for example, may prevent adequate air circulation.)
Clearance above the unit must also be maintained to allow air
circulation and to prevent heat buildup.
The Nº29 incorporates thermal sensors located near each group of
output devices. If the internal 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.
For those involved in custom installations and cabinetry, this
information may be useful:
■
All temperature measurements are made at the bottom of the
internal heatsink, 2 inches above the chassis floor.
■
Normal heatsink temperature at idle after warmup with
unrestricted airflow at 22
°
C (72
°
F) ambient temperature: 35
°
C
(95
°
F).
■
Maximum permissible heatsink temperature before thermal
protection is activated: 80
°
C (176
°
F).
Drawings are included in this manual to facilitate special installations
and custom cabinetry (see "Dimensions").
For your protection, review "Important safety instructions" before
you install your Nº29.
Unpacking
PRECAUTION
Placement
Ventilation
Custom installations
PRECAUTION