Madrigal Imaging power amplifier, N33 manual Pin 1 Signal ground

use, the amplifiers will operate out of phase with each other, resulting in a loss of bass and poor imaging.

Although the best form of balanced interconnection is via a balanced cable and XLR connectors, it is possible to operate the Nº33 in a balanced con- figuration by using both inverting and non-inverting RCA inputs simulataneously. This approach is generally less desirable, however, since separate single-ended cables will be more susceptible to noise pickup than a single balanced cable. If this approach is taken, you must remove the shorting strap from the XLR input. Save it for possible use at a later date.

2BALANCED AUDIO INPUT

Accepts a signal from a preamplifier with balanced outputs via a high qual- ity XLR connector. If connection to the preamplifier is made with a bal- anced interconnecting cable, it is important to remove the shorting plug from between pins #1 and #3 of the XLR input which was placed there prior to shipment from the factory. Save it for possible use at a later date.

The pin assignments of this XLR-type female input connector is:

PUSH		Pin 1: Signal ground
2	1	Pin 2: Signal + (non-inverting)
		Pin 3: Signal – (inverting)
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Connector ground lug: chassis ground

These pin assignments are consistent with the standards adopted by the Audio Engineering Society. Refer to the operating manual of your balanced- output preamplifier to verify that the pin assignments of its output connec- tors correspond to your Mark Levinson Nº33. If not, wire the cables so that the appropriate output pin connects to the equivalent input pin.

3COMMUNICATIONS LINK AND REMOTE TURN-ON INPUTS

The Nº33 may be controlled by a “linked” Mark Levinson 30-series pream- plifier when the slave in communications port is connected to the master port of the preamplifier. Subsequent Nº33 amplifiers may be “daisy chained” from the first Nº33’s slave out to their slave in port, up to a maximum of six amplifiers total.

slave out slave in

remote turn-on jacks

c o m m u n i c a t i o n s p o r t s

A “straight-through,” six conductor Link cable with six-conductor modular connectors on both ends is used to connect the preamplifier to the first power amplifier. Such a cable is made (counter-intuitively) by incorporating a 180° twist into the cable before terminating it, as shown below:

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