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3
Signal connection
The Nº20.6 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.
When connecting the Nº20.6 to a preamplifier, we recommend
Madrigal Audio Laboratories HPC Interconnect Cable. HPC is
available in various lengths, terminated with RCA, XLR, and Camac
connectors. For more information, see your Mark Levinson dealer.
The Nº20.6 can be operated in either single-ended or balanced
mode. In each of these modes, the Nº20.6 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 non-inverting. This
means that the output signal of the amplifier will be in phase with the
input signal.
For single-ended normal operation, connect the appropriate channel
of the preamplifier's main output to the non-inverting (
+
) input on the
rear panel of the Nº20.6. Be sure to insert the shorting strap (included in
the accessory pack) between pins 1 and 3 of the XLR-type connector
on the rear panel of the Nº20.6.
Connectors
Cables
Connection methods and
operating modes
Single-ended normal
(non-inverting) operation
– +
–
+
Nº20.6
–
+
Loudspeaker
From preamplifier's
main output
PUSH
Shorting strap
Figure 2: Connections for
single-ended normal
(non-inverting) operation