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Installation Considerations
The Nº33H requires special care during installation to ensure
optimal performance. Pay particular attention to the information
included in this section.
Placement Your Mark Levinson Nº33H Monaural Power Amplifiers are specifi-
cally designed to stand on the floor, and must be used as free-
standing units. In most installations, locating them near the loud-
speakers is best. Obviously, this approach minimizes the length of
the speaker wires and necessitates longer interconnecting cables
from the preamplifier to the power amplifiers. The advantage to
this strategy is that that the interconnecting cables carry low-cur-
rent signals which are more readily transmitted over distances
with great accuracy than are the necessarily high current signals
required by loudspeakers.
You should leave at least six inches (15 cm) of free space behind
each Nº33H so that the AC cord and connecting signal cables
have sufficient room to bend without crimping or undue strain.
You should also position each amplifier for easy access to the rear
panel power switch. This switch effectively disconnects the ampli-
fier from the AC mains.
Caution! Before moving the Nº33H, make sure it is powered off with the
rear panel power switch. Then, make sure the power cord is
disconnected from the electrical outlet.
Ventilation Your Mark Levinson Nº33H power amplifier is designed to com-
plement your listening room visually, with a tall and narrow
frontal area that reduces the effective “footprint” and makes it far
more presentable than would be the case with a more traditional-
ly proportioned design. As a result, it can be more easily placed
beside your loudspeakers. As freestanding units, the Nº33H ampli-
fiers normally will have no problem with ventilation. Please fol-
low the precautions below.
• DO select a dry, well-ventilated location out of direct sunlight.
• DO ensure free air flow around the Nº33H to allow for
adequate heat dissipation through air circulation.
• DO keep the top plate and heat sinks free from obstructions
that could reduce air circulation.
• DO use fans to increase air circulation if the Nº33H is
installed in an enclosed space.