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Signal connections
The Nº29 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 Nº29 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 Nº29 can be operated in either single-ended or balanced mode.
In each of these modes, the Nº29 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.
Before making any signal or speaker connections, make sure
that the Nº29 is disconnected from your preamplifier and from
the AC mains.
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 this type of operation, connect the main outputs of the
preamplifier to the appropriate (left and right channel) RCA-type
inputs (non-inverting) on the rear panel of the Nº29. Be sure that the
shorting strap is inserted into the XLR-type connectors between Pins 1
and 3.
Connectors
Cables
Connection methods and
operating modes
+ – – +
– ++ –
Left
Loudspeaker
Right
Loudspeaker
Nº29
From preamplifier main output
Left
channel
Right
channel
PUSHPUSH
Shorting strap
Single-ended normal
(non-inverting) operation
Figure 2: Connections for
single-ended normal
(non-inverting) operation
PRECAUTION