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Operating Voltage, Nº333
Your Mark Levinson Dual Monaural Power Amplifier is characterized by its re-
markable ability to pass a musical signal with utter integrity, regardless of how
demanding that signal and the loudspeakers used might be. When called upon to
do so, your amplifier is capable of generating truly prodigious power levels into
virtually any speaker load, on either an instantaneous or a continuous basis.
Depending on the demands placed on the amplifier by your loudspeaker and
your listening habits, it is possible (although unlikely) for the capabilities of your
electrical service to become the limiting factor in the performance of your sys-
tem. As a result, the Nº 333 has been designed to be capable of taking advantage
of dedicated high current AC mains supplies which cannot limit its performance.
For compatibility with existing household outlets, a standard three prong, 15 am-
pere plug is provided on the captive, high current AC mains cable. If you decide
to use a dedicated, higher-current (30 ampere) line for your Nº 333, the only
thing that needs to be changed is the AC plug itself.
Important: When it comes to high current AC wiring such as the Nº 333 is
capable of using, building regulations and electrical codes
vary from region to region, and even from one municipality to
the next. For this reason, it is impossible for us to anticipate the
requirements of your area with regard to high current AC
hookups. If you plan to install a dedicated, high current AC
line for your Nº 333, please review this section carefully and
then contact a local electrical contractor for advice.
The Mark Levinson Nº 333 amplifiers may be factory-set for 100V, 120V, 200V,
210V, 220V, 230V or 240V AC mains operation at either 50 or 60Hz, based on the
country for which they are manufactured. Depending on local electrical codes
and regulations, the plug on the supplied AC input module may need to be re-
placed by a local, licensed electrical contractor. The maximum current require-
ments (in amperes) at these various voltages under various test conditions are
listed in the table shown below. (Note that only 230V units are sold in the Euro-
pean Union countries, per CE requirements.)
Nº 333 AC mains maximum
current requirements
100V 120V 200V 210V 220V 230V 240V
Off .1 .09 .05 .047 .045 .043 .042
Standby 2.04 1.70 1.02 .971 .927 .887 .850
On, at idle 3.49 2.91 1.75 1.66 1.59 1.52 1.46
300w @ 8Ω* 18.48 15.4 9.24 8.80 8.40 8.03 7.70
600w @ 4Ω* 31.9 26.6 15.9 15.2 14.5 13.9 13.3
1200w @ 2Ω* 54.2 45.2 27.1 25.9 24.7 23.6 22.6
* power ratings are continuous (rms) with less than 0.5% THD, from 20-20,000 Hz.
It is important to understand that these are worst-case requirements under severe
test conditions, which are extremely unlikely to be encountered in normal use.