Mark Levinson 33 Operating Manual page 18

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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.
2 BALANCED 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:
Pin 1: Signal ground
PUSH
Pin 2: Signal + (non-inverting)
2 1
Pin 3: Signal – (inverting)
3
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.
3 COMMUNICATIONS LINK AND REMOTE TURN-ON INPUTS
The Nº33 may be controlled by a "linked" Mark Levinson 30-series pream-
plifier when the slave in
port of the preamplifier. Subsequent Nº33 amplifiers may be "daisy chained"
from the first Nº33's
six amplifiers total.
slave out
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:
communications port is connected to the
to their
slave out slave in
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
master
port, up to a maximum of