Mark Levinson 27.5 - Bridged Operation; Balanced Bridged Operation

9
Bridged operation
When greater power output is desired, the Nº27.5 may be bridged for
monophonic operation into load impedances of at least 2Ω.
Note: Make sure the loudspeaker is rated to handle extremely high
power levels. For example, a bridged Nº27.5 driving an 8Ω
loudspeaker is capable of delivering 400W RMS.
For the best bridged performance, we recommend balanced
interconnection. If your preamplifier provides balanced output, follow
the steps below.
Balanced
bridged operation
Figure 9: Connections for
balanced bridged
operation
PUSHPUSH
–+
Loudspeaker
+–
Nº27.5
–+
From preamplifier
balanced main output
Balanced
bridging cable
Right
channel
Left
channel
1. For balanced bridged operation, you'll need a special three-
ended cable. You may fabricate such a cable according to
Figure 10; 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.