3
Signal connections
The Nº27.5 incorporates RCA-type and XLR-type connectors for audio
signal input.
The Madrigal-designed RCA-type connectors used for single-ended
audio interconnection are a great improvement over ordinary RCA-
type connectors. The gold-plated XLR-type connectors employed are
of European design, and are made to professional application
standards.
For connecting the Nº27.5 to a preamplifier, we recommend Madrigal
Audio Laboratories HPC Interconnect Cable. HPC is available in
various lengths, pre-terminated with RCA, XLR, and Camac
connectors. For more information, see your Mark Levinson dealer.
The Nº27.5 can be operated in either single-ended or balanced
mode. In each of these modes, the Nº27.5 can be operated either
normally (non-inverting) or inverting.
This manual describes the connections for single-ended normal (non-
inverting), single-ended inverting, and balanced normal (non-
inverting) operation. If you have questions about these or other
methods of signal connection, see your Mark Levinson dealer.
Typical audio systems require that the amplifier be of the non-inverting
type. This means that the output signal of the amplifier will be in phase
with the input signal.
For single-ended normal operation, connect your preamplifier's left-
channel main output to the left-channel RCA-type input on the rear
panel of the Nº27.5. Connect your preamplifier's right-channel main
output to the right-channel RCA-type input on the rear panel of the
Nº27.5. Be sure that the shorting strap is inserted into both of the
Nº27.5's XLR-type connectors, between Pins 1 and 3.
PUSHPUSH
+–
Nº27.5
–+ –+
Left
Loudspeaker
+–
Right
Loudspeaker
From preamplifier main output
Shorting strap
Right
channel
Left
channel
Figure 2: Connections for
single-ended normal
(non-inverting) operation
Connection methods
and operating modes
Single-ended normal
(non-inverting) operation
Cables
Connectors
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