10
1. For balanced bridged operation, you'll need a special three-
ended cable. You may fabricate such a cable according to
Figure 9; it's also available through your Mark Levinson dealer as
part of a balanced bridging kit.
Note:
If fabricating the cable, be sure to use high-quality
audio interconnect cable (such as Madrigal HPC).
Connect the bridging cable's female XLR-type connector to the
appropriate channel of your preamplifier's balanced main
output.
2. Connect the bridging cable's male XLR-type connectors to the
balanced inputs of the inverting and non-inverting Nº20.6
amplifiers.
3. Connect the positive (
+
) output of the normal (non-inverted)
amplifier to the
+
(positive or red) input terminal of the
loudspeaker. Connect the positive (
+
) output of the inverted
amplifier to the
–
(negative or black) input terminal of the
loudspeaker.
4. Connect another short piece of heavy-gauge speaker wire
between the chassis ground binding post of each amplifier.
If your preamplifier provides only single-ended output, follow the steps
below.
1. Connect the appropriate channel of the preamplifier’s main
output to the non-inverting (
+
) input of the normal (non-inverted)
amplifier. Using a second preamplifier main output from the same
channel, or a T-connector (available from your Mark Levinson
dealer), connect this input to the inverting (
–
) input of the inverted
amplifier.
2. Insert an RCA-type shorting plug (available from your Mark
Levinson dealer) in each of the two remaining unused inputs.
Figure 9: Balanced
bridging cable
Connections for
single-ended bridged
operation
2
1
3
2
1
3
Signal ground (shield)
Non-inverted
XLR male
line-mount
(rear view)
Twisted pair
Inverted
XLR male
line-mount
(rear view)
1
2
3
XLR female
line-mount
(rear view)
Tw
isted pair
Signal ground
(shield)
Summary of Contents for Mark Levinson ?20.6
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