Mark Levinson 53 owner manual Loudspeaker Binding Posts, Input, Pin Assignments

Loudspeaker Binding Posts

Note

Caution!

Mark Levinson

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).

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.

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.

10	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