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Mark Levinson
Loudspeaker Binding
Posts
The Nº53 has two pairs of custom-made, gold-plated, high-current
“hurricane” loudspeaker binding posts; each pair connected directly
to the output of the amplifier. The positive binding posts, labeled +
(positive), are red; the negative binding posts are black and are
labeled – (negative).
Note Ensure when connecting the loudspeaker that at least one positive and
one negative binding post is used. There is NO ground reference.
Banana plugs can also be used to connect the speaker cables to the
binding posts via the banana-plug sockets. Banana-plug sockets are
not available for some models.
Caution! DO NOT OVERTIGHTEN the binding posts. The innovative design
of these binding posts provides more leverage, ensuring that
high-contact, tight-pressure connections are achieved when
finger-tightened.
DO NOT FORCE the binding-post “wings” over a bent or oversized
connector. Doing so may damage the binding post.
Input
One balanced and one single-ended (unbalanced) connector are
available for the audio input.
The pin assignments, shown below, of the XLR-type female input
connector are consistent with the standards adopted by the Audio
Engineering Society. Refer to the operating manual of your pream-
plifier to ensure that the pin assignments of its balanced output
connectors correspond to the Mark Levinson Nº53 power amplifier.
If not, wire the cables so that the appropriate output pin connects
to the equivalent input pin.
Pin Assignments:
Pin 1: Signal Ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal - (inverting)
Connector Shell - Chassis Ground